Label the following reactions as oxidation or reduction reactions: (a) cu → cu2+ + 2e- (b) 2h+ + 2e → h2 (c) 02- → 02 +2e (d) ch4 + 402- → co2 + 2h,0 + 8e (e) 02- + co co2 + 2e- (f) 202 + h20+2e - → 2(oh)- (g) h2 + 2(oh) → 2h20 +2e-
1.4 from the reactions listed in problem 1.3 (or their reverse), write three complete and balanced pairs of electrochemical half reactions. for each pair of reactions, identify which reaction is the cathode reaction and which reaction is the anode reaction.