Question

Give the equation for the discharge of ion at the cathode during the electrolysis of acidified water ?

Answer 1

Discharge of ion at cathode :

$H^{+}$ $+$ $e^{-}$ $\to$ $H$

$2H$ $+$ $2H$ $\to$ $2H_2$

Overall at cathode : $4H^{+}$ $+$ $4e^{-}$ $\to$ $2H_2$