Question

1.explain why plaster of Paris should be stored in a
moisture proof container? 2 . what is the use of common salt in soap industry? ​

Answer 1

Answer:

1) Plaster of Paris should be stored in a moisture-proof container because Plaster of Paris, a powdery mass, absorbs water (moisture) to form a hard solid known as gypsum.

2) In soap manufacturing process, after the saponification reaction, soap is washed with concentrated brine solution (NaCl) to separate glycerin.