Answer :
The following reactions take place when acidulated water is electrolysed.
Anode: 2H2O(l)→ O2(g) + 4H+ (aq) + 4e–
Cathode: 4H+ + 4e-→ 2H2
Overall cell reaction: 2H2O(l) → O2(g) + 2H2(g)
pH remains the same because concentration of H+ ions remains constant.
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