WAEC - Chemistry (2003 - No. 23)
The equation for the reaction at the anode during the electrolysis of concentrated sodium chloride solution is
2CI- (aq) → CI,sub>2(g) + 2e-
40H-(aq) → 2H2O(I) + O2(g) + 4e -
Na+(aq) + e- → Na(s)
2H+(aq) + 2e- → H2(g)