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  4. What products are formed during the electrolysis of a concentrated aqueous solution of sodium chloride? I. Cl2 (g) II.NaOH (aq), III. H2 (g)

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Q. What products are formed during the electrolysis of a concentrated aqueous solution of sodium chloride?
I. $Cl_{2} (g)$
II.$NaOH (aq)$,
III. $H_{2} (g)$

The s-Block Elements

Solution:

$NaCl \to Na^{+}+Cl^{-}; 2\,Cl^{-} \to Cl_{2}+2e^{-}$
$HOH \to H^{+}+OH^{-}; 2H^{+} +2e^{-} \to H_{2}$;
$Na+OH^{-} \to NaOH$