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Air and Its Composition

Chlorine is u...

Question

Chlorine 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 the redox change taking place in water.

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Solution

The balanced chemical reaction for the redox reaction between chlorine and sulphur dioxide is:
$C l_{2} + S O_{2} + 2 H_{2} O \to 2 C l^{-} + S O_{4}^{2 -} + 4 H^{+}$ .

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NCERT - Standard VI

Air and Its Composition

Standard VI Chemistry

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