Reaction on Cathode – H2O(l ) + e–→ 1/2 H2(g) + OH– (aq)

Reaction on Anode – Cl– (aq) → 1/2 Cl2(g) + e–

Complete Reaction:

NaCl(aq)+H2O(l)→NaOH(aq)+H2(g)+Cl2(g)

NaOH turns the brine solution basic in this reaction