How will the pH of brine (aq. NaCl solution) | vedclass

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(A) The $pH$ of the solution will rise as $NaOH$ is formed in the electrolytic cell.During the electrolysis of brine $(NaCl_{(aq)})$,the reduction of

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It will increase

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(A) The $pH$ of the solution will rise as $NaOH$ is formed in the electrolytic cell.During the electrolysis of brine $(NaCl_{(aq)})$,the reduction of $Na^+$ ions does not occur at the cathode because water is more easily reduced.The reduction reaction at the cathode is:$2 H_2O_{(l)} + 2 e^- \rightarrow H_{2(g)} + 2 OH^-_{(aq)}$As the reaction proceeds,the concentration of $OH^-$ ions increases in the solution.Since $pOH = -\log_{10} [OH^-]$,an increase in $[OH^-]$ leads to a decrease in $pOH$.Given the relationship $pH + pOH = 14$,a decrease in $pOH$ results in an increase in $pH$.Therefore,the $pH$ of the brine solution increases during electrolysis.

How will the $pH$ of brine (aq. $NaCl$ solution) be affected when it is electrolysed?

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