Standard Hydrogen Electrode/unit-8

Standard Electrode Potential:

Standard electrode potential of a metal is defined as the potential difference developed in a cell consisting of two electrodes, the pure metal being in contact with a molar solution of one of its ions and the standard or normal hydrogen electrode.

If S.H.E acts as Anode,           H₂ (g) ——>  2H⁺  + 2e^–

If S.H.E acts as cathode,         2H⁺  + 2e^–  ——->  H₂ (g)