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Explain the reaction of chlorine with sodium hydroxide solution.

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(i). Procedure:
- Bubble chlorine slowly through cold dilute sodium hydroxide solution.
- Dip litmus paper.

(ii). Observation:
- Litmus paper is bleached; the product has the colour and smell of chlorine.

(iii). Explanation:
- Chlorine dissolves in sodium hydroxide to form a pale yellow solution of sodium chlorate (I) or sodium hypochlorite (NaClO);
- The sodium chlorate (I) bleaches dyes by oxidation.

Kavungya answered the question on April 29, 2019 at 08:51

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Explain the reaction of chlorine with sodium hydroxide solution.

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