Preparation of Plaster of Paris
Asked by Mukesh Dashing · 2 years ago
How is Plaster of Paris prepared?
1 Answer
Plaster of Paris is prepared by heating gypsum, which has the chemical formula CaSO4·2H2O (calcium sulfate dihydrate), to a temperature of about 373K (100°C). This process removes 1.5 molecules of water, resulting in the formation of calcium sulfate hemihydrate (CaSO4·1/2H2O).
The reaction can be represented as:
CaSO4·2H2O (Gypsum) → CaSO4·1/2H2O (Plaster of Paris) + 1.5H2O
NEET Faculty · 2 years ago
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