What is plaster of paris ? How is it obtained from gypsum?
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Answer:
Plaster of Paris is known as calcium sulphate hemihydrate. (CaSO₄·1/2H₂O)
Formation:
CaSO₄·2H₂O (Gypsum) when heated under 373 K temperature forms CaSO₄·1/2H₂O (Plaster of Paris) + 3/2H₂O.
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