Question

Plaster of paris should be stored in a moisture proof container .explain why?​

Answer 1

Answer:

plaster of paris should be kept in dry and moisture proof containers because it combines with water to form GYPSUM . the following is the chemical equation for the above reaction-

CaSO₄* 1/2 H₂O + 1  1/2 H₂O= CaSO₄*2H₂O

(POP)                                      (GYPSUM)

 

ps:- POP stands for plaster of paris

Answer 2

plaster of paris is stored in moisture proof container because when it react with 3/2 molecule of water then it form gypsum

here is equation that show reaction between Plaster Of Paris and water.

Caso4 .1/2 H20 + 3 /2H20 ==> Caso4 .2H20

whenever plaster of paris is exposed to air it take 3 by 2 molecules of water and form gypsum.

due to formation of gypsum salt the Plaster of Paris is going hard.

so to prevent it from getting hard it should be kept in moisture proof container not in exposed air .