Question

What is the overall reaction potential for the reaction below?
Ag+(aq) + Cu(s) mc024-35.jpg Ag(s) + Cu2+(aq)
mc024-36.jpg0.46 V
+0.46 V
+0.57 V
+1.14 V

Answer 1

Ag+ is reduced (Ag+ + e− → Ag, E° = +0.80 V) and Cu is oxidized (Cu → Cu2+ + 2e−, reverse of Cu2+ + 2e− → Cu, E° = +0.34 V). Balanced reaction: 2Ag+ + Cu → 2Ag + Cu2+.
E°cell = E°cathode − E°anode = 0.80 V − 0.34 V = +0.46 V.