Following reactions may occur at cathode during the electrolysis of aqueous CuCl2 solution using Pt electrodes:
On the basis of their standard electrode potential values, which reaction is feasible at cathode?
Answer & explanation
Correct answer: option 1
Since the standard electrode potential of Cu2+ is greater than that of H+, so reaction (i) will be feasible at cathode.
i.e. Cu2+ + 2e- → Cu
Cu2+ has higher reduction potential.