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Sample Test
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Chapter_3_Chemical_Reactions
1. Which of the following cannot be determined from a
balanced chemical equation?
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a.
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The number of molecules of reactants and products.
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b.
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The number of atoms of each element reacting.
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c.
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The number of moles of reactants and products.
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d.
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The relative mass of each reactant and product.
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e.
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Whether the reaction will proceed as written.
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ANSWER:
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e
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POINTS:
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1
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TOPICS:
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3.1 Chemical Equations
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OTHER:
|
Comprehension
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|
|
2. In the reaction given below, if
12 moles of aluminum oxide are consumed, how many moles of oxygen gas are
produced?
2 Al2O3 4 Al + 3 O2
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a.
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4
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b.
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18
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c.
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3
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d.
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6
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e.
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12
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ANSWER:
|
b
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POINTS:
|
1
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TOPICS:
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3.1 Chemical Equations
|
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OTHER:
|
Application
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|
|
3. In the reaction given below,
for every two molecules of aluminum oxide consumed, how many molecules of
oxygen are produced?
2 Al2O3 4 Al + 3 O2
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ANSWER:
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a
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POINTS:
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1
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TOPICS:
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3.1 Chemical Equations
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OTHER:
|
Application
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|
|
4. In the reaction shown below,
which substances are dissolved in water?
Cu(s) + H2SO4(aq) CuSO4(aq) + H2(g)
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a.
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Cu
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b.
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H2SO4 and CuSO4
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c.
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H2 and
Cu
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d.
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H2 and
H2SO4
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e.
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Cu and CuSO4
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ANSWER:
|
b
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POINTS:
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1
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TOPICS:
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3.1 Chemical Equations
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OTHER:
|
Knowledge
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|
|
5. For the reaction given below,
how many moles of aluminum will react if 12 moles of Br2 react and 8 moles of
AlBr3 are
produced?
2 Al + 3 Br2 2 AlBr3
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a.
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4
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b.
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16
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c.
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12
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d.
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40
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e.
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8
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ANSWER:
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e
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POINTS:
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1
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TOPICS:
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3.1 Chemical Equations
|
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OTHER:
|
Application
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6. What interpretation is most
accurate for the reaction?
2 H2O(l) 2 H2(g) + O2(g)
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a.
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Two molecules of water will produce three molecules of a
gas mixture.
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b.
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The gas mixture produced will include fewer oxygen atoms
than you started with.
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c.
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The H2 in H2O indicates that the hydrogen molecules
were present at the begining of the reaction.
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d.
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The chemical equation must be incorrect since there is a
2 in front of the H2O.
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e.
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The chemical equation must be incorrect since you end up
with more molecules than you start with.
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ANSWER:
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a
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POINTS:
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1
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TOPICS:
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3.1 Chemical Equations
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OTHER:
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Analysis
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|
NOTES:
|
recognition of hidden meanings
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7. Which equation is best
represented by the drawing?
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a.
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Al + Cl2 → AlCl3
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b.
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2 Al + 3 Cl2 → 2 AlCl3
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c.
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Al + Cl →AlCl3
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d.
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2 Al + Cl6 → Al2Cl6
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e.
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Al +3 Cl2 → 2 Al6Cl
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ANSWER:
|
b
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POINTS:
|
1
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TOPICS:
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3.1 Chemical Equations
|
|
OTHER:
|
Analysis
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|
NOTES:
|
Generalize from given facts
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8. What interpretation of the
reaction is most accurate for the reaction?
CaCO3(s)
CaO(s) + CO2(g)
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a.
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The chemical equation must be incorrect because you
produce more compounds than you had at the beginning.
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b.
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Oxygen gas is produced as the reaction proceeds.
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c.
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The number of oxygen atoms increases as the reaction
proceeds.
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d.
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The solid reactant produces a pure product.
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e.
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The solid reactant yields a mixture that contains a new
solid and a gas.
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ANSWER:
|
e
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POINTS:
|
1
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TOPICS:
|
3.1 Chemical Equations
|
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OTHER:
|
Analysis
|
|
NOTES:
|
recognition of hidden meanings
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|
|
9. Potassium metal and chlorine
gas react in a combination reaction to produce an ionic compound. What is the
correct balanced equation for this reaction?
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a.
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2 K(s) + Cl2(g) → 2 KCl(s)
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b.
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K(s) + Cl2(g) → KCl2(s)
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c.
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K2(s)
+ Cl2(g)
→ 2 KCl(s)
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d.
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K(s) + Cl(g) → KCl(s)
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e.
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K(s) + Cl2(g) → KCl(s)
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ANSWER:
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a
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POINTS:
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1
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TOPICS:
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3.2 Balancing Chemical Equations
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|
OTHER:
|
Application
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|
NOTES:
|
Solve problems using required skills or knowledge
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|
|
10. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I CH3OH
+ II O2 III
CO2 +
IV H2O
I II III IV
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a.
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2 5 2 2
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b.
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1 2 1 2
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c.
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4 6 4 8
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d.
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1 3 1 2
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e.
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2 3 2 4
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ANSWER:
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e
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POINTS:
|
1
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TOPICS:
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3.2 Balancing Chemical Equations
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|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowldege
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11. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I KO2 +
II H2O
III KOH + IV O2
I II III IV
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a.
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2 2 4 3
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b.
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1 1 1 1
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c.
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4 2 4 3
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d.
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8 4 8 6
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e.
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2 1 2 1
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ANSWER:
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c
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POINTS:
|
1
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TOPICS:
|
3.2 Balancing Chemical Equations
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|
OTHER:
|
Application
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|
NOTES:
|
Solve problems using required skills or knowledge
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|
|
12. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I NH3 +
II O2 III
NO + IV H2O
I II III IV
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a.
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2 2 2 3
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b.
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4 5 4 6
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c.
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4 4 4 6
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d.
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8 10 8 12
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e.
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2 5 2 3
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ANSWER:
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b
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POINTS:
|
1
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TOPICS:
|
3.2 Balancing Chemical Equations
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|
OTHER:
|
Application
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|
NOTES:
|
Solve problems using required skills or knowledge
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|
13. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I Ni(ClO4)2 + II K2S III KClO4 + IV NiS
I II III IV
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a.
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2 1 1 2
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b.
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1 2 2 1
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c.
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1 1 1 2
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d.
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1 1 2 1
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e.
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1 2 1 1
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ANSWER:
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d
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POINTS:
|
1
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TOPICS:
|
3.2 Balancing Chemical Equations
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
14. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I BaCl2 +
II AgNO3 III
Ba(NO3)2 + IV AgCl
I II III IV
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a.
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1 2 1 2
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b.
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2 1 1 1
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c.
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1 1 1 2
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d.
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1 1 2 2
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e.
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1 2 2 1
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ANSWER:
|
a
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POINTS:
|
1
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TOPICS:
|
3.2 Balancing Chemical Equations
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
15. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I CO + II NO III CO2 + IV N2
I II III IV
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a.
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2 2 2 1
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b.
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1 2 2 1
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c.
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2 2 2 3
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d.
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2 1 2 1
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e.
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1 1 1 2
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ANSWER:
|
a
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POINTS:
|
1
|
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TOPICS:
|
3.2 Balancing Chemical Equations
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
16. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I Fe3O4 + II H2 III Fe + IV H2O
I II III IV
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a.
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2 8 6 8
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b.
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1 1 3 2
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c.
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2 4 6 4
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d.
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1 4 3 4
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e.
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1 2 3 2
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ANSWER:
|
d
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POINTS:
|
1
|
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TOPICS:
|
3.2 Balancing Chemical Equations
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
17. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I Al + II H2SO4 III Al2(SO4)3 + IV H2
I II III IV
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a.
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2 3 2 3
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b.
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4 6 1 6
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c.
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3 1 1 3
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d.
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2 3 1 3
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e.
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3 1 3 2
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ANSWER:
|
d
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POINTS:
|
1
|
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TOPICS:
|
3.2 Balancing Chemical Equations
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
18. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I K2S +
II AlCl3 III
KCl + IV Al2S3
I II III IV
|
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a.
|
3 2 6 1
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b.
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1 1 2 1
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|
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c.
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3 2 3 2
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|
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d.
|
3 2 6 2
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|
|
e.
|
2 3 2 3
|
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ANSWER:
|
a
|
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POINTS:
|
1
|
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TOPICS:
|
3.2 Balancing Chemical Equations
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
19. The Roman numerals in the
reaction given represent the coefficients in the balanced chemical equation.
What are the values of the coefficients?
I Na3PO4 + II Mg(NO3)2 III Mg3(PO4)2 + IV NaNO3
I II III IV
|
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a.
|
3 2 3 9
|
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b.
|
2 2 3 3
|
|
|
c.
|
2 3 1 6
|
|
|
d.
|
3 2 2 3
|
|
|
e.
|
2 1 1 6
|
|
ANSWER:
|
c
|
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POINTS:
|
1
|
|
TOPICS:
|
3.2 Balancing Chemical Equations
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
20. What ions are present in an
aqueous solution of lithium perchlorate, LiClO4(aq)?
|
|
a.
|
Li+ and
Cl–
|
|
|
b.
|
Li+,
Cl+, and
O42-
|
|
|
c.
|
Li+ and
ClO4–
|
|
|
d.
|
Li– and
Cl+
|
|
|
e.
|
Li+,
Cl–, and
O2-
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Seeing Patterns
|
|
|
21. Which compound will dissolve
in water in large amounts?
|
|
a.
|
BaSO4
|
|
|
b.
|
Na2SO4
|
|
|
c.
|
AgCl
|
|
|
d.
|
Al(OH)3
|
|
|
e.
|
MgS
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Observation and recall information
|
|
|
22. Which compounds will not
dissolve in water in large amounts at 20°C?
|
Ca(NO3)2
|
MgCO3
|
PbI2
|
K2SO4
|
|
I.
|
II.
|
III.
|
IV.
|
|
|
a.
|
II & III
|
|
|
b.
|
III & IV
|
|
|
c.
|
III & IV
|
|
|
d.
|
I & II
|
|
|
e.
|
I & IV
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Observation and recall of information
|
|
|
23. A solution containing an
unknown cation was added to three solutions and the following observations
were recorded:
|
SOLUTION
|
OBSERVATION
|
|
NaI
|
no precipitate
|
|
Na2SO4
|
precipitate
|
|
NaOH
|
no precipitate
|
The unknown cation is
|
|
a.
|
K+
|
|
|
b.
|
Pb2+
|
|
|
c.
|
Sr2+
|
|
|
d.
|
Ca2+
|
|
|
e.
|
Ag+
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Seeing patterns
|
|
|
24. Which statement about the
reaction below is true, given large amounts of reactants?
NaCl + AgNO3 NaNO3 + AgCl
|
|
a.
|
NaNO3 is
insoluble in water and will precipitate.
|
|
|
b.
|
AgCl is insoluble in water and will precipitate.
|
|
|
c.
|
Both NaNO3 and AgCl are insoluble in water and will
precipitate.
|
|
|
d.
|
All compounds in the reaction are soluble in water and
no reaction occurs.
|
|
|
e.
|
AgNO3 is
insoluble in water and no reaction will occur.
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
translate knowledge into new context
|
|
|
25. Which statement about the
reaction below is true, given large amounts of reactants?
Ba(NO3)2 + K2CO3 BaCO3 + 2KNO3
|
|
a.
|
K2CO3 is insoluble
in water and will precipitate.
|
|
|
b.
|
All compounds in the reaction are soluble in water and
no reaction occurs.
|
|
|
c.
|
Ba(NO3)2 is
insoluble in water and will precipitate.
|
|
|
d.
|
BaCO3 is
insoluble in water and will precipitate.
|
|
|
e.
|
Both BaCO3 and KNO3 are insoluble in water and will
precipitate.
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
translate knoweldge into new context
|
|
|
26. Write a balanced chemical
equation for the exchange reaction that occurs when KOH(aq) is added to FeCl3(aq).
|
|
a.
|
KOH(aq) + FeCl3(aq) → FeOH(aq) + KCl(s)
|
|
|
b.
|
KOH(aq) + FeCl3(aq) → FeOH(s) + KCl(aq)
|
|
|
c.
|
3 KOH(aq) + FeCl3(aq) → Fe(OH)3(s) + 3 KCl(aq)
|
|
|
d.
|
3 KOH(aq) + FeCl3(aq) → K3Fe(s) + 3 HClO(aq)
|
|
|
e.
|
No reaction occurs.
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Predict consequences
|
|
|
27. What is the net ionic equation
for the reaction of Ca(NO3)2 and Na2SO4?
|
|
a.
|
2Ca+ +
SO42− Ca2SO4
|
|
|
b.
|
Na2+ +
2NO3−
Na(NO3)2
|
|
|
c.
|
Ca+ +
SO4− CaSO4
|
|
|
d.
|
Ca2+ +
SO42− CaSO4
|
|
|
e.
|
Na+ +
NO3− NaNO3
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Predict consequences
|
|
|
28. What is the net ionic equation
for the reaction of AlCl3 and NaOH?
|
|
a.
|
Al3+ +
OH3− AlOH
|
|
|
b.
|
Na3+ +
3Cl− NaCl3
|
|
|
c.
|
Al3+ +
3OH− Al(OH)3
|
|
|
d.
|
Na+ +
Cl− NaCl
|
|
|
e.
|
Al+ +
OH− AlOH
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.3 Precipitation Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Predict consequences
|
|
|
29. Which of the following is/are
properties of acids?
|
I.
|
Acids increase the hydrogen ion concentration in water.
|
|
II.
|
Acids react with many metals to produce precipitates.
|
|
III.
|
Acids are responsible for the bitter taste of some foods
and beverages.
|
|
|
a.
|
I only
|
|
|
b.
|
II only
|
|
|
c.
|
III only
|
|
|
d.
|
I and II
|
|
|
e.
|
I, II, and III
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Knowledge of major ideas
|
|
|
30. What is the correct formula
for the hydronium ion?
|
|
a.
|
NH4+
|
|
|
b.
|
H+
|
|
|
c.
|
H3O+
|
|
|
d.
|
OH−
|
|
|
e.
|
H−
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
observation and recall of information
|
|
|
31. What is the correct formula
for the hydroxide ion?
|
|
a.
|
H−
|
|
|
b.
|
OH−
|
|
|
c.
|
H3O+
|
|
|
d.
|
NH4+
|
|
|
e.
|
H+
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Observation and recall of information
|
|
|
32. Which statement about strong
acids is true?
|
|
a.
|
Strong acids are weak electrolytes.
|
|
|
b.
|
Citric acid is a strong acid.
|
|
|
c.
|
Strong acids react only with strong bases.
|
|
|
d.
|
Strong acids are very concentrated.
|
|
|
e.
|
Strong acids are mostly converted to ions when dissolved
in water.
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Interpret facts, compare, contrast
|
|
|
33. Which statement about bases is
true?
|
|
a.
|
Bases react with many metals to produce a flammable gas.
|
|
|
b.
|
Bases turn phenolphthlalein colorless.
|
|
|
c.
|
Bases increase the hydroxide ion concentration of water
when dissolved in it.
|
|
|
d.
|
Bases react with limestone to produce gas bubbles.
|
|
|
e.
|
Bases increase the hydronium ion concentration of water
when dissolved in it.
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Interpret facts, compare, contrast
|
|
|
34. All of the following are
strong electrolytes except:
|
|
a.
|
H2SO4.
|
|
|
b.
|
HBr.
|
|
|
c.
|
HNO3.
|
|
|
d.
|
NaOH.
|
|
|
e.
|
CH3COOH.
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Observation and recall of information
|
|
|
35. Write a balanced, net-ionic
equation for the reaction of aqueous solutions of hydrochloric acid (HCl) and
sodium carbonate (Na2CO3).
|
|
a.
|
H+(aq)
+ NaCO3–(aq) → NaHCO3(s)
|
|
|
b.
|
2 H+(aq)
+ CO32-(aq) → H2CO3(aq)
|
|
|
c.
|
2 HCl(aq) + Na2CO3(aq) → H2CO3(aq) + 2 NaCl(aq)
|
|
|
d.
|
Cl–(aq)
+ Na+(aq)
→ NaCl(aq)
|
|
|
e.
|
2 H+(aq)
+ CO32-(aq) → H2O(l) + CO2(g)
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Predict consequences
|
|
|
36. Which statement about
neutralization reactions is true?
|
|
a.
|
The net ionic equation for a neutralization reaction
shows the formation of water.
|
|
|
b.
|
A weak acid cannot neutralize a strong base.
|
|
|
c.
|
Organic acids neutralize bases by forming hydrogen gas.
|
|
|
d.
|
The net ionic equation for a neutralization reaction
shows the formation of soluble salts.
|
|
|
e.
|
The net ionic equation for a neutralization reaction
shows the formation of hydrogen gas
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Grasp meaning
|
|
|
37. Write a balanced chemical
equation for the reaction of aqueous ammonia with aqueous sulfuric acid.
|
|
a.
|
2 NH3(aq)
+ H2SO4(aq) → N2S(g) + 4 H2O(l)
|
|
|
b.
|
2 NH3(aq)
+ H2SO4(aq) → 2 NH4+(aq) + SO42-(aq)
|
|
|
c.
|
NH3(aq)
+ H2SO4(aq) → NH5+(aq) + SO42-(aq)
|
|
|
d.
|
2 NH3(aq)
+ H2SO4(aq) → SO2(g) + 2 NH2S(aq) + 2 H2O(l)
|
|
|
e.
|
2 NH3(aq)
+ H2SO4(aq) → 2 (NH4)2SO4(aq) + 2 H2O(l)
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.4 Acid-Base Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
38. What is the reducing agent in
the reaction below?
Zn(s) + CuSO4(aq) ZnSO4(aq) + Cu(s)
|
|
a.
|
Cu2+
|
|
|
b.
|
Zn
|
|
|
c.
|
Zn2+
|
|
|
d.
|
SO42−
|
|
|
e.
|
CuSO4
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Identification of components
|
|
|
39. Which one or two substances
are reduced in the reaction below?
2 Al + 3 Cl2 2 AlCl3
|
|
a.
|
Cl2
|
|
|
b.
|
Al and Cl2
|
|
|
c.
|
Al and AlCl3
|
|
|
d.
|
Al
|
|
|
e.
|
Cl2 and
AlCl3
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Identifcation of components
|
|
|
40. Which of the following is a
reducing agent?
|
|
a.
|
Br2
|
|
|
b.
|
Na
|
|
|
c.
|
F2
|
|
|
d.
|
O2
|
|
|
e.
|
I2
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Translate knowledge into new context
|
|
|
41. Which of the following
represents oxidation?
|
|
a.
|
F2 +
2e− 2 F−
|
|
|
b.
|
Ni2+ +
2e− Ni
|
|
|
c.
|
2H+ +
2e− H2
|
|
|
d.
|
Na Na+ + e−
|
|
|
e.
|
Mg2+ +
2e− Mg
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Translate knowledge into new context
|
|
|
42. Which of the following
represents reduction?
|
|
a.
|
Al Al3+ + 3e−
|
|
|
b.
|
Na Na+ + e−
|
|
|
c.
|
Fe Fe2+ + 2e−
|
|
|
d.
|
H2 2H+ + 2e−
|
|
|
e.
|
O2 +
4e− 2 O2−
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Translate knowledge into new context
|
|
|
43. Which substance is oxidized in
the reaction below?
NaNO3 +
Pb NaNO2 +
PbO
|
|
a.
|
Na+
|
|
|
b.
|
NaNO2
|
|
|
c.
|
NaNO3
|
|
|
d.
|
PbO
|
|
|
e.
|
none of these choices
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Seeing patterns
|
|
|
44. Which substance is reduced in
the reaction below?
Na2SO4 + 4 C Na2S + 4CO
|
|
a.
|
CO
|
|
|
b.
|
Na2S
|
|
|
c.
|
S
|
|
|
d.
|
Na2SO4
|
|
|
e.
|
none of these choices
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Seeing patterns
|
|
|
45. What is the oxidation number
of O in Fe2O3?
|
|
a.
|
+2
|
|
|
b.
|
−3
|
|
|
c.
|
−2
|
|
|
d.
|
−5
|
|
|
e.
|
+5
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Application
|
|
NOTES:
|
Use methods, concepts, theories in new situations
|
|
|
46. What is the oxidation number
of O in H2O2?
|
|
a.
|
0
|
|
|
b.
|
+1
|
|
|
c.
|
−2
|
|
|
d.
|
−1
|
|
|
e.
|
+2
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Application
|
|
NOTES:
|
Use methods, concepts, theories in new situations
|
|
|
47. In which of the following
compounds does the sulfur atom have the highest (i.e., most positive)
oxidation number?
|
|
a.
|
Na2SO4
|
|
|
b.
|
H2S
|
|
|
c.
|
SO2
|
|
|
d.
|
H2SO3
|
|
|
e.
|
S8
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Application
|
|
NOTES:
|
Use methods, concepts, theories in new situdations
|
|
|
48. What is the oxidation number
of P in PO43−?
|
|
a.
|
−5
|
|
|
b.
|
+3
|
|
|
c.
|
−3
|
|
|
d.
|
+5
|
|
|
e.
|
−2
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Application
|
|
NOTES:
|
Use methods, concepts, theories in new situations
|
|
|
49. What is the oxidation number
of N in NH4+?
|
|
a.
|
+1
|
|
|
b.
|
−1
|
|
|
c.
|
+3
|
|
|
d.
|
0
|
|
|
e.
|
−3
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Application
|
|
NOTES:
|
Use methods, concepts, theories in new situdations
|
|
|
50. What is oxidized in the
reaction below?
I2O5 + CO I2 + CO2
|
|
a.
|
CO and CO2
|
|
|
b.
|
CO2
|
|
|
c.
|
I2O5
|
|
|
d.
|
CO
|
|
|
e.
|
I2
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Seeing patterns
|
|
|
51. What is reduced in the
reaction below?
CH4 +
O2 CO2 + H2O
|
|
a.
|
O2
|
|
|
b.
|
CO2
|
|
|
c.
|
H2O
|
|
|
d.
|
O2 and
CO2
|
|
|
e.
|
CH4
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Seeing patterns
|
|
|
52. Which element is most
reactive?
|
|
a.
|
K
|
|
|
b.
|
Pb
|
|
|
c.
|
Fe
|
|
|
d.
|
Mg
|
|
|
e.
|
Cu
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Observation and recall of information
|
|
|
53. Which element is least
reactive?
|
|
a.
|
Pb
|
|
|
b.
|
Zn
|
|
|
c.
|
Al
|
|
|
d.
|
Cu
|
|
|
e.
|
Fe
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Observation and recall of information
|
|
|
54. Which reaction will not occur?
|
|
a.
|
Mg(s) + CaSO4(aq) MgSO4(aq) + Ca(s)
|
|
|
b.
|
H2(g)
+ AgNO3(aq)
HNO3(aq)
+ Ag(s)
|
|
|
c.
|
Ba(s) + HCl(aq) BaCl2(aq) + H2(g)
|
|
|
d.
|
Al(s) + SnCl2(aq) AlCl3(aq) + Sn(s)
|
|
|
e.
|
Mg(s) + CuSO4(aq) Cu(s) + MgSO4(aq)
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.5 Oxidation-Reduction and Electron Transfer
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Predict consequences
|
|
|
55. In the reaction given below,
how many grams of water are consumed if 4.0 g of hydrogen gas and 32.0 g of
oxygen gas are produced?
2 H2O 2
H2 + O2
|
|
a.
|
36.0 g
|
|
|
b.
|
2.0 g
|
|
|
c.
|
18.0 g
|
|
|
d.
|
20.0 g
|
|
|
e.
|
4.0 g
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
|
56. In the reaction given below,
how many grams of sodium metal are consumed if 2.02 g of hydrogen gas are
produced?
2 Na(s) + 2 H2O(l) 2 NaOH(aq) + H2(g)
|
|
a.
|
92.0 g
|
|
|
b.
|
46.0 g
|
|
|
c.
|
5.75 g
|
|
|
d.
|
11.5 g
|
|
|
e.
|
23.0 g
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
|
57. How many moles of H2O are formed from the
complete combustion of 45.0 g of methanol, CH3OH?
2 CH3OH
+ 3 O2 2
CO2 +
4 H2O
|
|
a.
|
2.81 mol
|
|
|
b.
|
0.711 mol
|
|
|
c.
|
1.41 mol
|
|
|
d.
|
50.6 mol
|
|
|
e.
|
1.42 mol
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
58. How many moles of O2 will be produced by
the decomposition of 32.0 grams of hydrogen peroxide, H2O2?
2 H2O2 2 H2O + O2
|
|
a.
|
34.0 mol
|
|
|
b.
|
544 mol
|
|
|
c.
|
1.88 mol
|
|
|
d.
|
0.941 mol
|
|
|
e.
|
0.470 mol
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
59. How many grams of ammonia will
be formed from the complete reaction of 0.237 moles of H2?
N2 + 3 H2 2 NH3
|
|
a.
|
4.04 g
|
|
|
b.
|
6.06 g
|
|
|
c.
|
0.158 g
|
|
|
d.
|
2.69 g
|
|
|
e.
|
0.237 g
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
60. How many moles of oxygen will
be produced if 27.6 grams of Al are produced?
2 Al2O3 4 Al + 3 O2
|
|
a.
|
24.6 mol
|
|
|
b.
|
0.767 mol
|
|
|
c.
|
1.02 mol
|
|
|
d.
|
12.3 mol
|
|
|
e.
|
0.256 mol
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
61. How many grams of CuCl are
formed from the complete reaction of 0.750 mol Cu?
2 Cu + Cl2 2 CuCl
|
|
a.
|
32.2 g
|
|
|
b.
|
43.6 g
|
|
|
c.
|
101 g
|
|
|
d.
|
148.5 g
|
|
|
e.
|
74.5 g
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
62. How many grams of TiCl4 are needed to produce
0.132 moles of MgCl2?
2 Mg + TiCl4 Ti + 2 MgCl2
|
|
a.
|
6.26 g
|
|
|
b.
|
12.5 g
|
|
|
c.
|
50.1 g
|
|
|
d.
|
12.6 g
|
|
|
e.
|
25.0 g
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
63. How many grams of KClO3 are needed to produce
of 4.26 moles of O2?
2 KClO3 2
KCl + 3 O2
|
|
a.
|
136 g
|
|
|
b.
|
522 g
|
|
|
c.
|
348 g
|
|
|
d.
|
174 g
|
|
|
e.
|
783 g
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
64. How many grams of Fe2O3 are formed by the
complete reaction of 6.75 moles of iron?
4 Fe + 3 O2 2 Fe2O3
|
|
a.
|
539 g
|
|
|
b.
|
242 g
|
|
|
c.
|
701 g
|
|
|
d.
|
1080 g
|
|
|
e.
|
350 g
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
65. How many grams of Al2O3 are formed by the
complete reaction of 48.5 g of Fe2O3?
Fe2O3 + 2 Al Al2O3 + 2 Fe
|
|
a.
|
62.4 g
|
|
|
b.
|
26.1 g
|
|
|
c.
|
37.7 g
|
|
|
d.
|
139 g
|
|
|
e.
|
31.0g
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
66. How many grams of Na2O are formed by the
complete reaction of 35.0 g of O2?
4 Na + O2 2 Na2O
|
|
a.
|
56.7 g
|
|
|
b.
|
113 g
|
|
|
c.
|
67.8 g
|
|
|
d.
|
136 g
|
|
|
e.
|
33.9 g
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
67. How many grams of H2 must react to produce
of 75.0 g of PH3?
2 P + 3 H2 2 PH3
|
|
a.
|
6.67 g
|
|
|
b.
|
75.0 g
|
|
|
c.
|
4.45 g
|
|
|
d.
|
2.97 g
|
|
|
e.
|
113 g
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.6 The Mole and Chemical Reactions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
68. In the reaction below, 8.0 g
of H2 react
with 7.0 g of O2. Which of the following statements is incorrect?
2 H2 +
O2 2 H2O
|
|
a.
|
More moles of hydrogen are consumed than moles of
oxygen.
|
|
|
b.
|
More grams of water are produced than grams of oxygen
are consumed.
|
|
|
c.
|
More grams of oxygen are consumed than grams of
hydrogen.
|
|
|
d.
|
More grams of hydrogen are consumed than grams of
oxygen.
|
|
|
e.
|
More moles of water are produced than moles of oxygen
are consumed.
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.7 Limiting Reactant
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
69. In the reaction given below,
how many grams of C14H9Cl5 will be produced by the reaction of 25.0 g of each of
the starting materials?
C2HOCl3 + 2 C6H5Cl C14H9Cl5 + H2O
|
|
a.
|
78.7 g
|
|
|
b.
|
121 g
|
|
|
c.
|
157 g
|
|
|
d.
|
354 g
|
|
|
e.
|
39.4 g
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.7 Limiting Reactant
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
70. The plot represent a series of
reactions. For each reaction, the initial mass of bromine is the same but the
initial mass of iron (Fe) is changed. Which statement is correct?
|
|
a.
|
Bromine is the limiting reagent when 1 gram of iron is
reacted.
|
|
|
b.
|
The limiting reagent is the iron when you start with 4
grams.
|
|
|
c.
|
The limiting reagent is bromine in all reactions.
|
|
|
d.
|
A reaction with 6 grams of iron would result in more
than 12 grams of product
|
|
|
e.
|
The limiting reagent is iron in all reactions.
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.7 Limiting Reactant
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Seeing patterns, recognition of hidden meanings
|
|
|
71. Methane and oxygen react to
produce carbon dioxide and water. If you observe multiple experiments where
the mass of methane is held constant and the mass of oxygen is increased in
each new experiment, what is expected?
The mass of water produced
|
|
a.
|
Increases proportionally in initial experiments then
eventually starts to decrease proportionally as more oxygen is added
|
|
|
b.
|
Increases proportionally to the mass of oxygen added.
|
|
|
c.
|
Increases proportionally in initial experiments then
eventually becomes constant even when more oxygen is added
|
|
|
d.
|
Is constant regardless of the amount of oxygen added
|
|
|
e.
|
Decreases as more carbon dioxide is produced
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.7 Limiting Reactant
|
|
OTHER:
|
Analysis
|
|
NOTES:
|
Predict consequences
|
|
|
72. How many grams of HCl are
required to completely react with 25.0 g of aluminum?
2 Al + 6 HCl 2 AlCl3 + 3 H2
|
|
a.
|
67.5 g
|
|
|
b.
|
102 g
|
|
|
c.
|
22.6 g
|
|
|
d.
|
136 g
|
|
|
e.
|
248 g
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.7 Limiting Reactant
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
73. How many grams of CO2 are produced from the
reaction of 5.00 g of C2H6 with 25.0 g of O2?
2 C2H6 + 7 O2 4 CO2 + 6 H2O
|
|
a.
|
14.6 g
|
|
|
b.
|
3.66 g
|
|
|
c.
|
7.51 g
|
|
|
d.
|
30.0 g
|
|
|
e.
|
19.6 g
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.7 Limiting Reactant
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
74. Given the combustion reaction
of a sugar.
C6H12O6(s) + 6 O2(g) 6 CO2(g) + 6 H2O(g)
Which experiment would produce the most CO2?
|
|
a.
|
React 1 mole of sugar with 3 moles of oxygen.
|
|
|
b.
|
React 1 mole of sugar with 1 mole of oxygen.
|
|
|
c.
|
React 0.5 moles of sugar with 6 moles of oxygen.
|
|
|
d.
|
React 1 mole of sugar with 4 moles of oxygen
|
|
|
e.
|
React 0.5 moles of sugar with 3 moles of oxygen
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.7 Limiting Reactant
|
|
|
75. What is the maximum possible
quantity of product obtained from a chemical reaction called?
|
|
a.
|
stoichiometric coefficients
|
|
|
b.
|
theoretical yield
|
|
|
c.
|
molecular weight of the product
|
|
|
d.
|
percent yield
|
|
|
e.
|
limiting reactant
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.8 Evaluating Chemical Synthesis: Percent Yield
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Observation and recall of information
|
|
|
76. The efficiency of a particular
synthesis method is evaluated by determining the:
|
|
a.
|
stoichiometric coefficients.
|
|
|
b.
|
limiting reactant.
|
|
|
c.
|
theoretical yield.
|
|
|
d.
|
molecular weight of the product.
|
|
|
e.
|
percent yield.
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.8 Evaluating Chemical Synthesis: Percent Yield
|
|
OTHER:
|
Knowledge
|
|
NOTES:
|
Observation and recall of information
|
|
|
77. If 32.0 g of oxygen reacts
with sufficient magnesium to produce magnesium oxide, what is the theoretical
yield?
2 Mg + O2 2 MgO
|
|
a.
|
20.2 g
|
|
|
b.
|
80.6 g
|
|
|
c.
|
32.0 g
|
|
|
d.
|
40.3 g
|
|
|
e.
|
161 g
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.8 Evaluating Chemical Synthesis: Percent Yield
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
78. If 110.0 g of iron reacts with
64.0 g of oxygen, what is the theoretical yield of Fe2O3?
4 Fe + 3 O2 2 Fe2O3
|
|
a.
|
157.3 g
|
|
|
b.
|
314.9 g
|
|
|
c.
|
212.9 g
|
|
|
d.
|
629.2 g
|
|
|
e.
|
319.4 g
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.8 Evaluating Chemical Synthesis: Percent Yield
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
79. If 225 g of carbon reacts with
excess sulfur dioxide to produce 195 g of carbon disulfide, what is the
percent yield for the reaction?
5 C + 2 SO2 CS2 + 4 CO
|
|
a.
|
15.7%
|
|
|
b.
|
19.5%
|
|
|
c.
|
22.5%
|
|
|
d.
|
68.4%
|
|
|
e.
|
78.9%
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.8 Evaluating Chemical Synthesis: Percent Yield
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
80. If 3.45 g of magnesium reacts
with 4.87 g of oxygen to produce 5.07 g magnesium oxide, what is the percent
yield for the reaction?
2 Mg + O2 2 MgO
|
|
a.
|
88.6%
|
|
|
b.
|
41.3%
|
|
|
c.
|
68.0%
|
|
|
d.
|
60.9%
|
|
|
e.
|
82.8%
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.8 Evaluating Chemical Synthesis: Percent Yield
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
81. The complete reaction of 16.12
g of titanium with 23.88 g of chlorine (Cl2) produces a compound with the formula TixCly. What is the empirical
formula of the compound?
|
|
a.
|
TiCl
|
|
|
b.
|
TiCl4
|
|
|
c.
|
Ti4Cl
|
|
|
d.
|
Ti2Cl
|
|
|
e.
|
TiCl2
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.9 Composition and Empirical Formulas
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
82. The complete reaction of 2.63
g of iron with 3.34 g of chlorine (Cl2) produces a compound with the formula FexCly. What is the empirical
formula of the compound?
|
|
a.
|
FeCl4
|
|
|
b.
|
FeCl2
|
|
|
c.
|
FeCl
|
|
|
d.
|
FeCl3
|
|
|
e.
|
FeCl5
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.9 Composition and Empirical Formulas
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
83. Which reaction is analogous to
the reaction used in combustion analysis?
|
|
a.
|
H2(g)
+ Cl2(g)
→ 2 HCl(g)
|
|
|
b.
|
CH4(g)
→ C(s) + 2 H2(g)
|
|
|
c.
|
2 H2O(l)
→ 2 H2(g)
+ O2(g)
|
|
|
d.
|
S8(s)
+8 O2(g)
→ 8 SO2(g)
|
|
|
e.
|
2 HgO(s) → 2 Hg(l) + O2(g)
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.9 Composition and Empirical Formulas
|
|
OTHER:
|
Synthesis
|
|
|
84. Which statement regarding the
complete combustion of a carbon compound is correct?
|
|
a.
|
Oxygen is consumed in the reaction and must be shown in
the balanced equation.
|
|
|
b.
|
Carbon dioxide and water are consumed in the reaction
and must be shown in the balanced equation.
|
|
|
c.
|
Heat is produced in the reaction and must be shown in
the balanced equation.
|
|
|
d.
|
The carbon compound is consumed in the reaction but need
not be shown in the balanced equation.
|
|
|
e.
|
Balancing the equation requires knowing whether the
products are gases or liquids.
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.9 Composition and Empirical Formulas
|
|
OTHER:
|
Knowledge
|
|
|
85. The complete combustion of a
hydrocarbon produces 16.48 g of CO2 and 4.508 g of H2O. What is the empirical formula of the hydrocarbon?
|
|
a.
|
CH2
|
|
|
b.
|
C3H8
|
|
|
c.
|
C2H5
|
|
|
d.
|
C3H4
|
|
|
e.
|
CH
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.9 Composition and Empirical Formulas
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
86. When 3.000 g of a compound
containing only carbon, hydrogen, and oxygen is burned, 6.820 g CO2 and 2.792 g H2O are produced. What is the
empirical formula of the compound?
|
|
a.
|
C2H4O
|
|
|
b.
|
C2H3O2
|
|
|
c.
|
C3H6O
|
|
|
d.
|
CH2O
|
|
|
e.
|
C3H3O2
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.9 Composition and Empirical Formulas
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
87. How many moles of NaOH are
present in 25.0 mL of a 0.1000 M NaOH solution?
|
|
a.
|
100 mol
|
|
|
b.
|
2.50 mol
|
|
|
c.
|
2.50 × 10−3 mol
|
|
|
d.
|
25.0 mol
|
|
|
e.
|
0.100 mol
|
|
ANSWER:
|
c
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
88. What is the molarity of a
solution that results when 3.64 g KCl is dissolved in water and diluted to
exactly 200.0 mL?
|
|
a.
|
1.82 M
|
|
|
b.
|
0.0182 M
|
|
|
c.
|
0.102 M
|
|
|
d.
|
0.244 M
|
|
|
e.
|
0.00977 Μ
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
89. Determine the ammonium ion
concentration of a solution that results when 4.53 g of (NH4)2SO4 is dissolved in water
and diluted to exactly 100.0 mL.
|
|
a.
|
1.37 M
|
|
|
b.
|
0.686 M
|
|
|
c.
|
2.51 M
|
|
|
d.
|
1.03 M
|
|
|
e.
|
0.343 M
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using requied skills or knowledge
|
|
|
90. Determine the volume of
solution that contains 15.0 g of AgNO3 if the solution is 0.375 M.
|
|
a.
|
33.1 mL
|
|
|
b.
|
235 mL
|
|
|
c.
|
956 mL
|
|
|
d.
|
31.5 mL
|
|
|
e.
|
247 mL
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
91. A 50.0 mL sample of 0.108 M H2SO4 is diluted to 250.0
mL. What is its new molarity?
|
|
a.
|
0.184 M
|
|
|
b.
|
0.0216 M
|
|
|
c.
|
0.542 M
|
|
|
d.
|
0.108 M
|
|
|
e.
|
0.461 M
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowdge
|
|
|
92. If a 45.0 mL sample of 2.20 M
Na2SO4 is diluted to yield a
final solution that is 0.110 M in sodium ions, what is the volume of the
final solution?
|
|
a.
|
4500 mL
|
|
|
b.
|
900 mL
|
|
|
c.
|
450 mL
|
|
|
d.
|
1800 mL
|
|
|
e.
|
110 mL
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
93. When a solution is diluted,
what is the relationship of the number of moles of solute in the more concentrated
initial volume of solution to the number of moles of solute in the less
concentrated final volume of solution?
|
|
a.
|
The ratio of the numbers is directly proportional to the
two volumes.
|
|
|
b.
|
The ratio of the numbers is inversely proportional to
the two volumes.
|
|
|
c.
|
The number of moles of solute in the more concentrated
initial volume is always greater.
|
|
|
d.
|
The number of moles of solute in the more concentrated
initial volume is always less.
|
|
|
e.
|
The number of moles of solute in both solutions is the
same.
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Comprehension
|
|
NOTES:
|
Interpret facts
|
|
|
94. Which of the methods described
below will yield 500 mL of a 0.100 M KMnO4 solution?
|
|
a.
|
Dissolve 15.8 g KMnO4 in water and dilute to exactly 500
mL.
|
|
|
b.
|
Dissolve 7.90 g of KMnO4 in water and dilute to exactly 500
mL.
|
|
|
c.
|
Add exactly 500 mL of water to KMnO4.
|
|
|
d.
|
Dilute 220 mL of 1.00 M KMnO4 to exactly 500 mL.
|
|
|
e.
|
Add exactly 500 mL of water to 7.90 g of KMnO4.
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Evaluation
|
|
NOTES:
|
Compare and discriminate between ideas
|
|
|
95. How many grams of KCl are in
125.0 mL of 0.375 M KCl?
|
|
a.
|
3.49 × 10−3 g
|
|
|
b.
|
46.9 g
|
|
|
c.
|
0.938 g
|
|
|
d.
|
3.49 g
|
|
|
e.
|
0.0469 g
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
96. How many moles of ions are in
285 mL of 0.0150 M MgCl2?
|
|
a.
|
5.26 × 10−2 mol
|
|
|
b.
|
1.28 × 10−2 mol
|
|
|
c.
|
1.05 × 10−1 mol
|
|
|
d.
|
4.128 × 10−3 mol
|
|
|
e.
|
5.26 × 10−1 mol
|
|
ANSWER:
|
b
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
97. A solution is prepared by
dissolving 20.0 g of NaI in enough water to make 300.0 mL of solution. How
many moles of ions are in 25.0 mL of this solution?
|
|
a.
|
0.0222 mol
|
|
|
b.
|
0.445 mol
|
|
|
c.
|
0.0445 mol
|
|
|
d.
|
0.111 mol
|
|
|
e.
|
0.0111 mol
|
|
ANSWER:
|
a
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
98. A solution is made by dissolving
60.0 g of AlCl3 in enough water to make 250.0 mL of solution. How many
moles of chloride ions are in 5.00 mL of solution?
|
|
a.
|
1.25 × 10−3 mol
|
|
|
b.
|
9.00 × 10−3 mol
|
|
|
c.
|
3.00 × 10−3 mol
|
|
|
d.
|
1.80 × 10−2 mol
|
|
|
e.
|
2.70 × 10−2 mol
|
|
ANSWER:
|
e
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.10 Solution Concentration: Molarity
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
|
99. How many grams of PbI2 will precipitate from
the reaction of 14.0 mL of 0.190 M Pb(NO3)2 with excess KI solution? Assume that all of the PbI2 is insoluble.
|
|
a.
|
6260 g
|
|
|
b.
|
3.69 g
|
|
|
c.
|
1.33 g
|
|
|
d.
|
1.23 g
|
|
|
e.
|
2.66 g
|
|
ANSWER:
|
d
|
|
POINTS:
|
1
|
|
TOPICS:
|
3.11 Stoichiometry in Aqueous Solutions
|
|
OTHER:
|
Application
|
|
NOTES:
|
Solve problems using required skills or knowledge
|
|
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