Question

write an equation to show that reaction between Plaster Of Paris and water in 5 marks​

Answer 1

Plaster of Paris when reacts with water liberating heat through crystallization. Gypsum is produced by heating plaster of paris to about 150-degree Celsius. When the dry plaster of paris powder is mixed with water it reforms into gypsum. Depending upon the temperature gypsum converts to hemihydrate or anhydrous form.

→CaSO4.1/2H2O + 3/2H2O ⟶ CCaSO.2H2O