Electrode potential and its calculation

Electrode potential depends upon

Statement-1: We can add the electrode potential in order to get electrode potential of net reaction. Statement-2: Electrode potential is an intensive

The hydrogen electrode potential depends on

Calculate the electrode potential at a copper electrode dipped in a 0.1 M solution of copper sulphate at 25^(@)C . The standard electrode potential of Cu^(2+)//Cu system is 0.34 volt at 298 K.

Why is it impossible to obtain the electrode potential for a single electrode?