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CBSE Class 10 Answered

why is calcium sulphate hemihydrate called as plaster of paris?
Asked by sejupandey | 29 Jul, 2008, 12:22: AM
answered-by-expert Expert Answer

A large gypsum deposit at Montmartre in Paris is the source of the name.

Plaster of Paris is a type of building material based on calcium sulfate hemihydrate, nominally CaSO4·0.5H2O. It is created by heating gypsum to about 150 °C.

2 CaSO4·2H2O → 2 CaSO4·0.5H2O + 3 H2O (released as steam).
Answered by | 29 Jul, 2008, 06:11: PM

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