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  • In the extraction of chlorine by electrolysis of brine ____________. (i) oxidation of {Cl}^{-} ion to chlorine gas occurs. (ii) reduction of {Cl}^{-} ion to chlorine gas occurs.

In the extraction of chlorine by electrolysis of brine ____________.

(i) oxidation of \text {Cl}^{-} ion to chlorine gas occurs.

(ii) reduction of \text {Cl}^{-} ion to chlorine gas occurs.

(iii) For the overall reaction, \Delta \text {G}^{\ominus } has a negative value.

(iv) a displacement reaction takes place.

Answers (1)

The answer is the option (i). The oxidation reaction of  \text {Cl}^{-} ion is responsible for the extraction of chlorine from brine

2H_{2}O(l)+2Cl^{-}(aq)\rightarrow H_{2}(g)+Cl_{2}(g)+2OH^{-}(aq)

The \Delta G^{0} for this reaction is +422\; kJ

\Delta G^{0}=-nFE^{0}

E^{0}=\frac{\Delta G^{0}}{nF}=-2.2 V

Posted by

infoexpert23

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