Download Chemistry 130: Exam #4 Review Multiple Choice: 1. Classify each of

Chemistry 130: Exam #4 Review
Multiple Choice:
1. Classify each of the following compounds as a strong, weak or non-electrolyte:
a. NH4Cl
e. H3PO4
b. HNO2
f. C2H5OH
c. AgNO3
g. LiOH
d. C12H22O11
h. KC2H3O2
2. Which of the following compounds is not a strong acid?
a. HClO4
b. HClO2
c. HNO3
d. HBr
3. Which compound is the oxidizing agent in the following balanced redox equation:
4 NH3(g) + 5 O2(g) à 4 NO(g) + 6 H2O(l)
a. O
b. N
c. O2
d. NH3 4. What is the oxidation number of carbon in the compound C18H32O16?
a. -1
b. 0
c. +1
d. +2
5. Which of the following reactions is/are possible?
a. Ca2+(aq) + Zn(s) à Ca(s) + Zn2+(aq)
b. Fe(s) + Zn2+(aq) à Zn(s) + Fe2+(aq)
c. Ca(s) + Fe2+(aq) à Ca2+(aq) + Fe(s)
d. both (a) and (b)
e. both (a) and (c)
f. both (b) and (c)
6. Which of the following statements is not true of an oxidizing agent?
a. the oxidizing agent gains electrons
b. the oxidizing agent is reduced
c. the oxidation number of the oxidizing agent decreases
d. the oxidizing agent causes reduction
7. Classify each of the following compounds as soluble or insoluble:
a. Cu(OH)2
e. Hg2I2
b. Li3PO4
f. Pb(CH3COO)2
c. BaSO4
g. (NH4)2CO3
d. Pb(NO3)2
h. Mg3(PO4)2
8. In the following redox reaction, how many moles of electrons are transferred?
5 H2C2O4(aq) + 2 MnO4-(aq) + 6 H+(aq) à 10 CO2(g) + 2 Mn2+(aq) + 8 H2O(l)
a. 1
b. 4
c. 5
d. 7
e. 10 9. Which of the following aqueous mixtures will not form a precipitate?
a. AlCl3 + LiOH
b. MnBr2 + AgC2H3O2
c. FeSO4 + Li2CO3
d. NH4OH + Cs2SO4
Problems:
1. Predict the products of the following reactions. Write the complete balanced equation, the ionic equation and
net ionic equation. If no reaction occurs, indicate this by writing N.R. (Include states of matter)
a. H2SO4 + Zn(OH)2 à
b. Cu(NO3)2 + K2S à
c. NaOH + FeBr3 à
d. NH4I + Pb(CH3COO)2 à
2. List the oxidation numbers for each element in the following compounds:
a. H2SO4
b. NaO2
c. CaH2
d. OF6
e. K2C2O4
3. Use the following reactions to list the elements Fe, Ni, Pb and Co in terms of their decreasing ability to act as
reducing agents (establish an activity series).
a. Fe(s) + Co2+(aq) à Fe2+(aq) + Co(s)
c. Ni2+(aq) + Pb(s) à N.R.
b. Co(s) + Pb2+(aq) à Co2+(aq) + Pb(s)
d. Co(s) + Ni2+(aq) à Co2+(aq) + Ni(s)
4. Based on your answer to problem 4, would you expect the following reaction to occur?
Fe(NO3)2(aq) + Co(s) à Co(NO3)2(aq) + Fe(s)
5. The following reaction occurs in a breathalyzer and is used to determine blood alcohol concentrations.
C2H5OH(aq) + 2 Cr2O72-(aq) + 16 H+(aq) à 2 CO2(g) + 4 Cr2+(aq) + 11 H2O(l)
Calculate the concentration of alcohol in a 25.00 mL sample of blood that requires 8.76 mL of 0.04988 M
K2Cr2O7 to completely react with all the alcohol present.
6. Consider the following reaction:
2 AgNO3(aq) + K2SO4(aq) à Ag2SO4(s) + 2 KNO3(aq)
If you mix 45.00 mL of 0.345 M AgNO3 with 50.00 mL of 0.163 M K2SO4, what is the mass of Ag2SO4
(grams) produced? What are the concentrations of each species remaining in solution?