How is plaster of Paris chemically different from gypsum? How may they be interconverted? Write one use of plaster of Paris?
Plaster of Paris is calcium sulphate hemihydrate (CaSO4. V2H2O) while gypsum is calcium sulphate dihydrate (CaSO4.2H2O).
Gypsum, when heated at a temperature of about 380K, changes to Plaster of Paris.
Plaster of Paris, when mixed with water, changes into hard mass called gypsum.
Plaster of Paris is used in hospitals for setting fractured bones.