Question

Percentage of water in plaster of Paris

Answer 1

Answer:

Usually, gypsum has water associated in the molecular structure (CaSO4·2H2O) and is approximately 23.3 percent Ca and 18.5 percent S (plaster of paris).

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Answer 2

Answer: 18 % of water is there in Plaster of Paris

1. The water of crystallisation is the fixed number of water molecules present in one formula unit of salt.
2. The chemical formula of plaster of Paris is CaSO4.12H2O.
3. Therefore, the water of crystallization in one molecule of plaster of Paris is 0.5. Hence, it is also called calcium sulphate hemihydrate.