Question

State the chemical name of Plaster of Paris. Write a chemical equation to show the reaction

between Plaster of Paris and water.
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Answer 1

CaSO4 • 1/2 H2O is the correct answer

Answer 2

Answer:

The chemical name of the Plaster of Paris is Calcium sulfate hemihydrate (CaSO4)1/2

H2O.

Reaction between plaster of Paris and water is CaSO4.1/2 H2O. +H2O gives it as CaSO4. 2 H2O.

In this reaction Gypsum is formed (CaSO4. H2O).