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Ch. 11 & 12:
Sec. 11.8-12.3
Supplemental Instruction
Iowa State University
Emily M
Chem 167
Burnett
12/9/13
1. What distinguishes homogenous and heterogeneous catalysis?
2. What is a VOC? What role do VOCs play in photochemical smog?
3. Which of the following statements about catalysts is false?
a. A catalyst will speed up the rate of a reaction.
b. Catalysts are used in very many commercially important chemical reactions.
c. Catalytic converters are examples of heterogeneous catalysts.
d. A catalyst can cause a nonspontaneous reaction to take place.
e. Chlorine radicals catalyzing the destruction of ozone is an example of
homogeneous catalysis.
4. In the following equilibrium, which of the following inferences can be drawn from the
equation alone?
HCO3-(aq)
H+(aq) + CO32-(aq)
a. The rate of the forward reaction equals the rate of the reverse reaction.
b. The equilibrium concentrations of all species are equal.
c. Equilibrium was attained by starting with only HCO3-(aq) solution.
5. Write equilibrium expressions for each of the following reactions.
a. 2 NOBr(g)
2 NO(g) + Br2(g)
b. 4 HCl(g) + O2(g)
2 H2O(g) + Cl2(g)
c. SO2(g) + ½ O2(g)
SO3(g)
d. CH4(g) + 2 O2(g)
CO2(g) + 2 H2O(g)
e. C2H5OH(g) + 3 O2(g)
f. AgCl(s)
2 CO2(g) + 3 H2O(g)
Ag+(aq) + Cl-(aq)
g. Zn(s) + Cu2+(aq)
Cu(s) + Zn2+(aq)
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6. For each of the following, are the products or the reactants favored?
a.
AgCl(s)
Ag+(aq) + Cl-(aq)
b. Ca2+(aq) + CO32-(aq)
c. N2O4
CaCO3
2 NO2
K = 1.7x10-10
K = 2.2x108
K = 1.10
7. Nitrosyl chloride, NOCl, decomposes to NO and Cl2 at high temperatures.
2 NOCl(g)
2 NO(g) + Cl2(g)
Suppose you place 2.00 mol NOCl in a 1.00 L flask and raise the temperature to 462°C.
When equilibrium has been established, 0.66 mol NO is present. Calculate the
equilibrium constant Kc for the decomposition reaction from this data.