Question

how is plaster of paris different from gypsum? how can they be interconverted? write two uses of plaster of Paris?​

Answer 1

Plaster of Paris is different from Gypsum in term of water of crystallization. Gypsom has 2 mole of water of crystallization where as Plaster of Paris has half mole of water of crystallization. Plaster of Paris is prepared from heating gypsum. (i) It is used for making moulds or casts for toys pottery, ceramics etc.

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Answer 2

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Plaster of paris (POP) has chemical formula CaSO4. 1/2 H2O which is produced by heating gypsum having chemical formula CaSO4. heating gypsum gives POP and adding water to POP gives gypsum as shown in the reaction above. Plaster of Paris is used for making toys, materials for decoration, and for making smooth surfaces.