How is plaster of paris prepared ?

1.	How is plaster of paris prepared ?
Answer» Solution :Plaster of PARISE is a HEMIHYDRATE of calcium sulphate `CaSO_(4^())1//2H_(2) O` . It is OBTAINED by HEATING gypsumat 393 K `underset("Gypsum")(2CaSO_(4^())2H_(2))O_((s))overset(Delta)tounderset("Plaster of paris")(2CaSO_(4^(*))H_(2)O)+3H_(2)O`

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