SSC (Marathi Semi-English) 10thMaharashtra State Board
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Chemicals from Common Salt - Plaster of Paris

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  • Preparation and Uses of Plaster of Paris

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Plaster of Paris:-

When gypsum is heated at 373 K then it comes calcium sulphate hemihydrate which is known as Plaster of Paris. Its chemical formula is CaSO4.H2O. Doctors use it as a plaster for supporting fractures bones. Plaster of Paris can be change again to gypsum on mixing water to it.

CaSO4.H2O + H2O → CaSO4.2H2O

(Plaster of Paris)            (Gypsum)

When gypsum is heated at 373 K then it comes calcium sulphate hemihydrate which is known as Plaster of Paris. Its chemical formula is CaSO4.H2O.

Doctors use it as a plaster for supporting fractures bones. Plaster of Paris can be change again to gypsum on mixing water to it.

CaSO4.H2O + H2O → CaSO4.2H2O

 

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