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Karnataka Board PUCPUC Science 2nd PUC Class 12

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

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Question

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

Short/Brief Note
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Solution

Anode: \[\ce{2H2O(l) -> O2(g) + 4H + (aq) + 4e^{-}}\]

Cathode: \[\ce{4H^{+} + 4e^{-} -> 2H2}\]

Overall cell reaction: \[\ce{2H2O(l) -> O2(g) + 2H2(g)}\]

pH remains the same because concentration of H+ ions remains constant.

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Chapter 3: Electrochemistry - Exercises [Page 40]

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NCERT Exemplar Chemistry Exemplar [English] Class 12
Chapter 3 Electrochemistry
Exercises | Q III. 42. | Page 40

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