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When acidulated water (dil.H2SO4 solution)

Question:

When acidulated water (dil.H2SO4 solution) is electrolysed, will the pH of the solution be affected? Justify your answer.

Solution:

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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