On electrolysis of aqueous solution of KI in | vedclass

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Question

(C) During the electrolysis of an aqueous solution of $KI$,the following reactions occur:At the cathode: $2H_2O(l) + 2e^- \rightarrow H_2(g) + 2OH^-(a

Vedclass · Accepted Answer

$a, c$

Vedclass · Answer

(C) During the electrolysis of an aqueous solution of $KI$,the following reactions occur:At the cathode: $2H_2O(l) + 2e^- \rightarrow H_2(g) + 2OH^-(aq)$. Thus,$H_2$ gas is released at the cathode.At the anode: $2I^-(aq) \rightarrow I_2(s) + 2e^-$. Thus,$I_2$ is formed at the anode,not $O_2$.Since $OH^-$ ions are produced at the cathode,the concentration of $OH^-$ increases,which means the $pH$ of the solution increases and the $pOH$ decreases.Therefore,statements $(a)$ and $(c)$ are correct.

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