1. In each of the following reactions, identify the substance oxidized and the substance
reduced. Identify the oxidizing agent and the reducing agent.
(a) 2 Al(g) + 3 Cl2(g)
2 AlCl3(s)(b) FeS(s) + 3 NO3-(aq) + 4 H3O+(aq)
3 NO(g) + SO42-(aq) + Fe3+(aq) + 6 H2O(l)4. Decide which phrase (a through d) best completes the sentence. A product-favored
oxidation-reduction reaction has
(a) A positive DGº and a positive Eº
(b) A negative DGº and a positive Eº
(c) A positive DGº and a negative Eº
(d) A negative DGº and a negative Eº
18. Reaction (a) is in neutral solution. Reactions (b) and (c) are in acid solution.
(a) Cl2(aq) + Br-(aq)
Br2(aq) + Cl-(l)(b) Sn(s) + H+(aq)
Sn2+(aq) + H2(g)(c) Zn(s) + VO2+(aq)
Zn2+(aq) + V3+(aq)28. The standard potential for the reaction of Mg(s) with I2(s) is +2.91 V. What is the
standard free energy change DGº for the reaction?
44. Calculate equilibrium constants for the following reactions:
(a) 2 Fe3+(aq) + 2 I-(aq)
2 Fe2+(aq) + I2(s)(b) I2(s) + 2 Br-(aq)
2 I-(aq) + Br2(aq)45. Calculate equilibrium constants for the following reactions:
(a) Zn2+(aq) + Ni(s)
Zn(s) + Ni2+(aq)(b) Cu(s) + 2 Ag+(aq)
Cu2+(aq) + 2 Ag(s)46. If you wish to convert 1.00 g of Au3+(aq) ion to Au(s) in a "gold-plating" process,
how long must you electrolyze a solution if the current passing through the circuit
is 2.00 amp?