What happens when bleaching powder react with any acid ?
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All the chlorine present in it is liberated when it reacts with acids
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When Bleaching Powder is treated with excess Dil. H2SO4, Cl2 is produced.
CaOCl2 + H2SO4 ----> CaSO4 + H2O + Cl2
CaOCl2 + 2HCl --------> CaCl2 + H2O + Cl2
Chlorine gas produced in this way is known as available chlorine.
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