Question

Preparation of baking soda? Preparation of plaster of Paris?

Answer 1

Explanation:

$\bold{Preparation\:of\:baking\:soda}$

-It is prepared by reaction of cold and concentrated solution of sodium chloride with ammonia and carbon dioxide.

-Plaster of Paris is prepared by heating gypsum at 373 K. On heating, it loses water molecules and becomes calcium sulphate hemihydrate (CaSO4. ½ H2O) which is called Plaster of Paris.