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CHEM 1211 Module Eight Multiple Choice Retest 10 points

Multiple Choice
Identify the letter of the choice that best completes the statement or answers the question.
 

 1. 
Which one of the following compounds is a weak electrolyte when dissolved in water?
a.
CH3CO2H
b.
NaCH3CO2
c.
KNO3
d.
Na2SO4
e.
sugar
 

 2. 
What are the spectator ions in the reaction between nitric acid and sodium hydroxide?
a.
Na+, OH-, H+, and NO3-
b.
H+ and OH-
c.
Na+ and NO3-
d.
H+ and NO3-
e.
Na+ and OH-
 

 3. 
What is the net ionic equation for the reaction of limestone with a strong acid?
a.
Ca(s) + 2 H+(aq) ® Ca2+(aq) + H2(g)
b.
CaO(s) + 2 H+(aq) ® Ca2+(aq) + H2O(ª)
c.
CaCO3(s) + 2 HCl(aq) ® CaCl2(aq) + H2CO3(aq)
d.
CaCO3(s) + 2 H+(aq) ® Ca2+(aq) + H2CO3(s)
e.
CaCO3(s) + 2 H+(aq) ® Ca2+(aq) + CO2(g) + H2O(ª)
 

 4. 
Write a balanced equation for the reaction of baking soda, NaHCO3, with hydrochloric acid.
a.
HCl(aq) + NaHCO3(aq) ® H2CO3(s) + NaCl(aq)
b.
4 HCl(aq) + NaHCO3(aq) ® CCl4(aq) + 2H2O(ª) + NaOH(aq)
c.
HCl(aq) + NaHCO3(aq) ® NaCl(aq) + H2O(ª) + CO2(g)
d.
HCl(aq) + NaHCO3(aq) ® NaOH(aq) + HCl(aq) + CO2(g)
e.
4 HCl(aq) + NaHCO3(aq) ® CH4(aq) + 2 Cl2(g) + O2(g) + NaOH(aq)
 

 5. 
Which compound is the reducing agent in the reaction below?

I-(aq) + ClO-(aq) ® IO-(aq) + Cl-(aq)
a.
I-
b.
ClO-
c.
H2O
d.
IO-
e.
Cl-
 

 6. 
What is the oxidation number of phosphorus in CaHPO4?
a.
-3
b.
-1
c.
+1
d.
+3
e.
+5
 

 7. 
Classify the reaction below.

FeCl3(aq) + 3 NaOH(aq) ® Fe(OH)3(s) + 3 NaCl(aq)
a.
gas forming
b.
oxidation-reduction
c.
acid-base
d.
precipitation
e.
decomposition
 

 8. 
If 4.39 g AlCl3 is dissolved in enough water to make exactly 100.0 mL of solution, what is the molar concentration of chloride ion?
a.
0.0234 M
b.
0.0934 M
c.
0.110 M
d.
0.132 M
e.
0.988 M
 

 9. 
Write a balanced half-reaction for the reduction of NO3-(aq) to NO(g) in an acidic solution.
a.
NO3-(aq) + H+(aq) + e- ® NO(g) + HO2(aq)
b.
NO3-(aq) + 2 H+(aq) + e- ® NO(g) + 2 OH-(aq)
c.
NO3-(aq) + 3 e- ® NO(g) + 2 O2(g)
d.
NO3-(aq) + 4 H+(aq) + 3 e- ® NO(g) + 2 H2O(ª)
e.
2 HNO3(aq) + 6 e- ® NO(g) + H2(g) + 3 O2(g)
 

 10. 
Write a balanced chemical equation for the following reaction in a basic solution.

H2O2(aq) + Cr(OH)3(s) ® H2O(ª) + CrO42-(aq)
a.
2 H2O2(aq) + 3 Cr(OH)3(s) ® H2O(ª) + 3 CrO42-(aq) + 11/2 H+(aq)
b.
2 H2O2(aq) + Cr(OH)3(s) ® H2O(ª) + CrO42-(aq) + 2 OH-(aq)
c.
H2O2(aq) + 2 Cr(OH)3(s) ® H2O(*ª) + 2 CrO42-(aq) + 4 H2O(ª)
d.
3 H2O2(aq) + 2 Cr(OH)3(s) + 4 OH-(aq) ® 2 CrO42-(aq) + 8 H2O(ª)
e.
4 H2O2(aq) + 2 Cr(OH)3(s) ® 2 H2O(ª) + 2 CrO42-(aq) + 4 OH-(aq)
 

Numeric Response
 

 11. 
In the blank below enter your score on the multiple choice portion of the Module Eight exam. Your improvement will be added to your score:

 



 
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