Answer to Question #118971 in Inorganic Chemistry for Shania kumar

Question

Consider the following half reactions and their standard reduction potential values to answer the following questions.

Cu2+ (aq) + e- Cu+ (aq) E° = 0.15 V
Br2 (l) + 2e- 2Br- (aq) E° = 1.08 V

i) State which reaction occurs at the anode and which at the cathode.
ii) Write the overall cell reaction.

Answer 1

i) cathode: Br2 (l) + 2e- 2Br- (aq)

anode: Cu2+ (aq) + e- Cu+ (aq)

ii) Br2 (l) + 2Cu+(aq) = 2Cu2+(aq) + 2Br-(aq)