Dijawab cepat pliisss butuh banget

E°sel = +1,89 V
Co => Co^{2+} + 2e ........ E° = x V
Ce^4+ + e => Ce^3+ ....... E° = 1,61 V

E°sel = x V + 1,61 V
1,89 V = x V + 1,61 V
x = 1,89 V - 1,61 V = + 0,28 V

Jawab : D