11.4 the reactions of chlorine

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4 Terms

1
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How can chlorine be used to purify water?

Cl2 (aq) + H2O (l) ⇌ HCl (aq) + HClO (aq)

Chlorine undergoes disproportion reaction

HClO sterilises water by killing bacteria

  • Chloric acid can further dissociate in water to form ClO-

  • ClO- also acts as a sterilising agent cleaning the water

2
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How does chlorine react in dilute alkali?

Chlorine undergoes disproportionation reaction

3
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How does chlorine react in cold alkali?

Cl2 (aq) + 2NaOH (aq) → NaCl (aq) + NaClO (aq) + H2O (l)

4
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How does chlorine react in hot alkali?

70’C

3Cl2 (aq) + 6NaOH (aq) → 5NaCl (aq) + NaClO3 (aq) + 3H2O (l)