Question

the ratio of the water molecule in plaster of paris and gypsum is??

Answer 1

Answer:

The number of water molecules in gypsum is 2 and in plaster of Paris is 1/2.

Explanation:

The plaster of Paris that is known as POP is prepared when we heat the gypsum at the temperature of 373K. This is why plaster of Paris (POP) has less molecules of water that is half and on the other hand, gypsum has more molecules of water that is two.

Answer 2

$CaSO_{4}.2H_{2}O$ ---Gypsum---- 2 molecules of water in each.

$CaSO_{4}.\frac{1}{2} H_{2}O$ ---Plaster Of Paris-----1/2 molecules of water in each

The plaster of Paris (also known as POP) is prepared when we heat the gypsum at the temperature of 373K. This is why plaster of Paris (POP) has less molecules of water that is half and on the other hand, gypsum has more molecules of water that is two.

∴2 and 1/2 molecules of water.

i.e 2:1 for gypsum

&   1:2 for Plaster of Paris