Question

Explain plaster of paris ??

and also the precautions while making it .

and its chemical formula .

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Answer 1

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It is the compound of calcium which is used for plastering of lecture bones is calcium sulphate hemihydrate(calcium sulphate half- hydrate)

✔ it is also called plaster of paris.

The formula of plaster of Paris is

CaSO4.1/2H2O

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the name plaster of Paris. came from that fact it was first of all made by heating gypsum which is mainly found in Paris..

it is commonly known as P.O.P.

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Chemical equation:

........................... heat to(100°c)

2(CaSO4.2H2O)-------------------->

2CaSO4.H2O. + 3H2O.

here reactant is gypsum.

it is heated on temperature 100°c.

then product obtained is plaster of Paris and water.

Precautions.

✔ in the preparation of plaster of Paris heating of gypsum should be controlled carefully.

✔

the temperature during the heating of gypsum should not be allowed to go above 100° c.

✔ this is because if the gypsum is heated above 100 degree Celsius then its water of crystallization is eliminated and anhydrous calcium sulphate (CaSO4) called dead burnt plaster is formed.

✔The anhydrous calcium sulphate does not set like plaster of Paris on adding water.

Answer 2

Here is yr answer mate

Plaster of Paris as it's its name suggest it is first used in Paris and it's its main component gypsum is mainly found in paris. plaster of Paris is formed when we heat the gypsum at 100 degree degrees Celsius.

Its chemical formula is CaSO4.1/2 H2O

It is calcium sulphate hemihydrate

precautions while prepare it is that-----

We should not heat the gypsum above 100 degree Celsius because if this happens a dead burnt plaster of Paris is formed .

It is used in decorative toys

It is also used to repair fractured bones

Hope it helps .............