How is plaster of Paris chemically different from gypsum? How may thes

1.	How is plaster of Paris chemically different from gypsum? How may these be inter converted? Write one use of plaster of Paris?
Answer» Plaster of Paris is different from Gypsum in term of water of crystallization.Gypsom has 2 mole of water of crystallization where as Plaster of Paris has half mole of water of crystallization.Plaster of Paris is prepared from heating gypsum. CaSO₄.2H₂O ------Heat/273 k--> CaSO₄.1/2 H₂O When plaster of Paris is mixed with water it get converted into Gypsum CaSO₄.1/2 H₂O + 3/2 H₂O ----------> CaSO₄.2H₂O The use of plaster of Paris are- (i) It is used for making moulds or casts for toys pottery, ceramics etc. (ii) In surgical bandages for setting fractured bones.

How is plaster of Paris chemically different from gypsum? How may these be inter converted? Write one use of plaster of Paris?

Answer»

Plaster of Paris is different from Gypsum in term of water of crystallization.Gypsom has 2 mole of water of crystallization where as Plaster of Paris has half mole of water of crystallization.Plaster of Paris is prepared from heating gypsum.

CaSO₄.2H₂O ------Heat/273 k--> CaSO₄.1/2 H₂O

When plaster of Paris is mixed with water it get converted into Gypsum

CaSO₄.1/2 H₂O + 3/2 H₂O ----------> CaSO₄.2H₂O

The use of plaster of Paris are-

(i) It is used for making moulds or casts for toys pottery, ceramics etc.

(ii) In surgical bandages for setting fractured bones.

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