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1. Predict the sign of So for the following reactions.
a. K(g) K(s)
b. Cl2(g) + 2H2O(l) Cl-(aq) + HClO(aq) + H3O+(aq)
c. CuCO3(s) + 2HNO3(aq) CO2(g) + H2O(l) + Cu2+(aq) + 2NO3-(aq)
2. Complete and balance the following reactions:
a. HPO42-(aq) + NaOH(aq)
b. CaCl2(aq) + Na2SO4(aq)
c. CrO42-(aq) + Fe(s) Cr3+(aq) + Fe2+(aq) pH = 1
d. MnO4-(aq) + NO2-(aq) MnO2(s) + NO3-(aq) pH = 14
3. Consider the formation of the complex ion Cd(NH3)42+(aq).
a. Find Go for the reaction at 25 oC.
b. The following cell is constructed: Cd(s)|Cd2+(aq)|| Cd(NH3)42+(aq)|NH3(aq)|Cd(s); what is Eo for the cell?
4. Consider the reaction: CaO(s) + HCl(aq)
H2O(l) + Ca2+(aq) + Cl-(aq).
a. Find Ho for the reaction.
b. Find So for the reaction.
c. Find Go for the reaction at 25 oC.
d. Is the reaction spontaneous?
5. The following cell was constructed:
a. Write the balanced reaction for the cell.
b. Find Eo for the cell.
c. Find the thermodynamic equilibrium constant for the cell at 25 oC.
d. The concentration of ions in the anode half-cell are 0.10 M and the concentration of ions in the cathode half-cell are 0.050 M; find the cell potential at 25 oC.