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