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Chilorine is used to purify drinking wat...

Chilorine is used to purify drinking water. Excess of chlorine is harmful. The excess of chlorine is removed by treating with sulphur dioxide. Present a balanced equation for this redox change taking place in water.

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Cl_2(g)+SO_2(aq)+2 H_2 O(l) rarr 2 HCl(aq)+H_2 SO_4(aq). Here .Cl_2(g). undergoẹs reduction to form .HCl. whereas .SO_2. undergoes oxidation to form .H_2 SO_4.
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