preperation of bleeching powder
Answers
Answer:
Bleeching powder is also called calcium chlorohypochlorite because it is considered as a mixed salt of hydrochloric acid and hypochlorous acid.
It is manufactured by the action of chlorine on dry slaked lime, Ca(OH)
This is the Odling view about its formation. There is another view proposed by Clifford according to which bleaching powder is a mixture of calcium hypochlorite and basic calcium chloride.
Use of bleeching Powder:
(i) as a disinfectant and germicide especially in the sterilization of drinking water.
(ii) for manufacture of chloroform.
(iii) for making wool unshrinkable.
(iv) as an oxidising agent in industry.
(v) mainly as bleaching agent for cotton, linen and wood pulp.
However, delicate articles like straw, silk, ivory, etc., are not bleached by bleaching powder.