Chlorine water - Enso Sui

Water saturated with chlorine. Chlorine dissolves quite well in water (10 °C, 0.9972 g/100 g water), and the solution is acidic and has a bleaching effect. Some of the chlorine dissolved in water is

_Cl2 + _H2OHClO + HCl

This equilibrium produces hypochlorous acid and hydrochloric acid. This hypochlorous acid is unstable and rapidly decomposes, especially under the action of light, releasing oxygen.

2HClO → 2HCl + _O2

At temperatures below 9.65°C, chlorine hydrate Cl ₂ ･8H ₂ O is formed in the solution, which is a type of inclusion compound. Chlorine water has a strong oxidizing effect, bleaching power, and kills microorganisms. It is used as an analytical reagent, disinfectant, bleach, deodorizer, etc.

Source: Morikita Publishing "Chemical Dictionary (2nd Edition)" Information about the Chemical Dictionary 2nd Edition

塩素を飽和した水．塩素は水にかなりよく溶け(10 ℃，0.9972 g/100 g 水)，その溶液は酸性を呈し，漂白作用がある．水に溶けている塩素の一部は，

Cl₂ ＋ H₂O HClO ＋ HCl

の平衡により次亜塩素酸と塩酸を生じる．この次亜塩素酸は不安定で，とくに光の作用のもとではすみやかに分解して酸素を放出する．

2HClO → 2HCl ＋ O₂

9.65 ℃ 以下で塩素水和物Cl₂･8H₂Oが溶液中に生成し，これは一種の包接化合物である．塩素水は酸化作用が強く，漂白力があり微生物を殺す．分析試薬，殺菌剤，漂白剤，脱臭剤などとして用いられる．

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