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Give the properties and uses of Bleaching Powder.

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Properties and uses bleaching powder:

  • Bleaching powder is a yellowish-white coloured solid substance. 
  • Its chemical name is Calcium oxychloride. 
  • It has a strong odour of chlorine gas. 
  • It is used for disinfection of drinking water at the water works and the water in the swimming pool.
  • It is used for bleaching of cloth. 
  • It is used for disinfection by the road side and garbage sites.
  • Dilute sulphuric acid and dilute hydrochloric acid react rapidly with bleaching powder to release chlorine gas completely.

CaOCl2 + H2SO4 → CaSO4 + Cl2 ↑ + H2O

CaOCl2 + 2HCl → CaCl2 + Cl2 ↑ + H2O

  • Calcium oxychloride reacts slowly with carbon dioxide to form calcium carbonate and chlorine.

CaOCl2 + CO2 → CaCO3 + Cl2

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