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Question
Predict the product of electrolysis in the following:
A dilute solution of \[\ce{H2SO4}\] with platinum electrodes.
Solution
\[\ce{H2SO4_{( aq)} -> 2H^+_{( aq)} + SO^{2-}_{4(aq)}}\]
\[\ce{H2O ⇌ H^+ + OH^-}\]
At cathode: \[\ce{H^+ + e^- -> H}\]
\[\ce{H -> H2_{(g)}}\]
At anode: \[\ce{OH^- -> OH^- + e^-}\]
\[\ce{4OH -> 2H2O_{(l)} + O2_{(g)}}\]
Hence, \[\ce{H2}\] will be released at the cathode and \[\ce{O2}\] at the anode.
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