question_answer 33)

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 this redox change taking place in water.

Answer:

\[\frac{\begin{align} & C{{l}_{2}}+{{H}_{2}}O\to 2HCl+[O] \\ & S{{O}_{ & 2}}+[O]\to S{{O}_{3}} \\ \end{align}}{\frac{C{{l}_{2}}+S{{O}_{2}}+{{H}_{2}}O\to 2HCl+S{{O}_{3}}}{{}}}\]