Electrochemistry

For the reduction of N

−

O3

ion in an aqueous solution, E° is + 0.96 V. Values of E° for some metal ions are given below:
V2+ (aq.) + 2e− → V ; E° = - 1.19 V
Fe3+ (aq.) + 3e− → Fe ; E° = - 0.04 V
Au3+ (aq.) + 3e− → Au ; E° = + 1.40 V
Hg2+ (aq.) + 2e− → Hg ; E° = + 0.86 V
The pair(s) of metals that is (are) oxidized by N

−

O3

in aqueous solution is(are)