Question

What do you infer from the fact that `M^(3+)//M^(2+)` standard electrode potential of Mn is comparatively higher and that of Fe is comparitively lower ?

Answer 1

`M^(3+)//M^(2+)` standard electrode potential of Mn is comparatively higher than that of Fe is comparatively lower. This is because much larger `3^(rd)` ionisation energy of Mn `(d^(5)" to "d^(4))`.