Question

Give Chemical equations - chlorine gas is passed over slaked lime

Answer 1

When chlorine is passed over slaked lime, Ca(OH)2, it is rapidly absorbed, forming bleaching powder, or chloride of lime. The reaction is: Ca(OH)2+ Cl2= CaOCl2+ H2O.

Uses of Bleacing Powder

It is used

(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

Answer 2

Ca(OH)2 + Cl2 --> CaOCl2 + H20