Gypsum and Plaster of Paris: Uses and Chemical specification

TN-06-Sciencne.
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Gypsum is a natural mineral. It is a very important ingredient in cement as it controls the rate of setting. If we do not add gypsum to cement, cement paste will become hard very fast.
Gypsum is not only used in construction industry but also used as fertiliser. it is a very good source of Calcium for plants. Calcium plays very important role in the growth of strong stem and branches.
The chemical name of gypsum is calcium sulphate dihydrate and it is represented as .
Gypsum is also used in making plaster of Paris. Let's learn more about plaster of Paris.
Plaster of Paris is obtained by heating gypsum and removing some amount of water from it. Chemical formulae of Plaster of Paris is .
And it's chemical name is calcium sulphate hemihydrate.
Plaster of Paris got it's name because it was first prepared from gypsum, found in Paris.
Plaster of Paris is very fine white powder and thus it is used in making black board chalk and setting bones after surgery. It is also used in statue Art and construction works.

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