Balance the following oxidation-reduction equations. The reactions occur in acidic or basic aqueous solution, as indicated. a.

Question:

Balance the following oxidation-reduction equations. The reactions occur in acidic or basic aqueous solution, as indicated.
a. H2S + NO3 → NO2 + S8 (acidic)
b. NO3 + Cu → NO + Cu2+ (acidic)
c. MnO4 + SO2 → SO42 + Mn2+ (acidic)
d. Bi(OH)3 + Sn(OH)3 → Sn(OH)62 + Bi (basic)