Given :
Co3+ + e− → Co2+ ; E° = +1.81 V
Pb4+ + 2e− → Pb2+ ; E° = +1.67 V
Ce4+ + e− → Ce3+ ; E° = +1.61 V
Bi3+ + 3e− → Bi ; E° = +0.20 V
Oxidizing power of the species will increase in the order :
a) |
Co3+ < Ce4+ < Bi3+ < Pb4+ |
b) |
Co3+ < Pb4+ < Ce4+ < Bi3+ |
c) |
Ce4+ < Pb4+ < Bi3+ < Co3+ |
d) |
Bi3+ < Ce4+ < Pb4+ < Co3+ |
Given :
Co3+ + e− → Co2+ ; E° = +1.81 V
Pb4+ + 2e− → Pb2+ ; E° = +1.67 V
Ce4+ + e− → Ce3+ ; E° = +1.61 V
Bi3+ + 3e− → Bi ; E° = +0.20 V
Oxidizing power of the species will increase in the order :
a) |
Co3+ < Ce4+ < Bi3+ < Pb4+ |
b) |
Co3+ < Pb4+ < Ce4+ < Bi3+ |
c) |
Ce4+ < Pb4+ < Bi3+ < Co3+ |
d) |
Bi3+ < Ce4+ < Pb4+ < Co3+ |
Greater the reduction potential, greater is the oxidising power.
So, Co3+ < Pb4+ < Ce4+ < Bi3+