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| 1. |
Preparation of POP |
| Answer» Plaster of paris is calcium sulphate hemihydrates. Its chemical formula is: CaSO4. ½H2O.It is prepared by heating gypsum to a temperature of 100°C in a kiln; it loses ¾ of its water of crystallisation and forms plaster of paris.\xa0Uses of Plaster of paris:(i) It is used as a fire proofing material.(ii) It is used in hospitals for setting fractured bones in the right position to ensure correct healing.Gypsum is calcium sulphate dihydrate. When gypsum is heated to a temperature of 100 °C, it loses ¾ of its water of crystallisation and forms plaster of paris. | |