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Chlorine is used to purify drinking water Excess of chlorine is harmful The excess chlorine is removed by treating with suphur dioxide present a balanced equation for the reaction for this redox change taking place in water |
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Answer» SOLUTION :The skeletal equation is `CI_(2)(aq)+SO_(2)+H_(2)(l)rarrCI^(-)(aq)+SO_(4)^(2-)(aq)` Reduction HALF equation `CI_(2)(aq)rarrCI^(-)(aq)` oxidation half equation `overset(+4)SO_(2)(aq)rarroverset(+6)SO_(4)^(2-)(aq)` oxidationaddding Eq (i) and Eq (II) we have `SO_(2)(aq)+2H_(2)O(l)rarrSO_(4)^(2-)(aq)+4H^(+)(aq)+2e^(=)` adding Eq (i) and Eq (ii) we have `CI_(2)(aq)+SO_(23)+2H_(2)O(l)rarr2CI^(-)(aq)+SO_(4)^(2-)(aq)+4H^(+)(aq)` this represents the balance redox reaction |
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