Question

what is water of crystalization.how is plaster of Paris prepared ? write any 2 uses of plaster of Paris
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Answer 1

Answer:

Yes

Explanation:

(a) Plaster of paris is calcium sulphate hemihydrate. Its chemical formula is: CaSO4. 1/2H2O. (b) It is prepared by heating gypsum to a temperature of 100oC in a kiln; it loses 3/4th of its water of crystallisation and forms plaster of paris.

Answer 2

$\huge\bf{Answer :}$

Water of crystallization : Fixed number of water molecules that form the structure of salt is called crystallization of water.

Plaster of Paris :

• It is a Calcium sulfate hemihydrate.

• Chemical Formula - $\sf{(CaSO_4) H_2O}$

• The plaster of Paris is made up of gypsum, lime, and cement.

• It is invented by Dr. Anthonius Mathijsen.

• It is obtained by heating gypsum at the temperature of 376K. While heating, gypsum loses its water molecules and creates plaster of Paris.

Uses of plaster of Paris :

• It is used in the medical field. The doctor used it for joining the fractured bones.

• It is used for creating designs and patterns on the ceiling.

• It is used for filling gaps between roofs and walls.

• It is used to create toys, cosmetics blackboard chalks, and cast for statues.

• It is used as a cement for making decorative materials.

• It is also used for creating chalks.