Question

Write chemical equation to represent the action of dilute hydrochloric acid on bleaching powder.

Answer 1

Bleaching Powder is calcium Oxychloride. The chemical formula of  bleaching powder is CaOCl2. 

When bleaching powder reacts with dil. HCl  to liberate Cl2 gas,water and Calcium Chloride .

CaOCl2  + 2HCl ----> CaCl2 +Cl2 +H2O.

Answer 2

Bleaching powder is calcium oxychloride (CaOCl2), also called as chloride of lime.

When bleaching powder is treated with an excess of dilute hydrochloric acid, all the chlorine present in it is liberated.

CaOCl₂+ 2HCl → CaCl₂+ Cl₂ + H₂O

The chlorine that is produced by the action of a dilute acid on bleaching powder acts as a bleaching agent due to the oxidizing property of chlorine.