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(B) The dissociation of aqueous sodium sulfate is: $Na _2 SO _4(a q) \rightarrow 2 Na ^{+}(a q)+ SO _4^{2-}(a q)$
Water also dissociates slightly: $H

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$H_2$

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(B) The dissociation of aqueous sodium sulfate is: $Na _2 SO _4(a q) ightarrow 2 Na ^{+}(a q)+ SO _4^{2-}(a q)$
Water also dissociates slightly: $H_2O_{(l)} ightleftharpoons H^+_{(aq)} + OH^-_{(aq)}$.
At the cathode,the reduction potential of $H^+$ ions is higher than that of $Na^+$ ions.
Therefore,$H^+$ ions are reduced to form hydrogen gas: $2H^+_{(aq)} + 2e^- 	o H_{2(g)}$.

What is produced at the cathode during the electrolysis of aqueous $Na_2SO_4$?

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