|Class 11 Chemistry The S Block Elements||Plaster of Paris|
Plaster of Paris
The chemical name of Plaster of Paris is Calcium Sulphate (CaSO4·½ H2O)).
It is obtained by heating the gypsum, CaSO4·2H2O, to 393 K.
2(CaSO4·2H2O) --> 2(CaSO4).H2O + 3H2O
It forms a plastic mass on addition of water which further gets hardened within 5-15 minutes.
It is extensively used in manufacturing decorating pieces, in repairing fractured bones or sprains.
Fig. Plaster of Paris used for plastering fractured bones and in making statues.