Question

Identify the compound of calcium when is used first plastering from of fractured bones with the help of chemical equation show how is it prepared and what special precautions should be taken during the preparation of this compound answer

Answer 1

The compound is Calcium Sulphate Hemihydrate (Caso4.1/2H20).

Caso4.1/2H20 + 3/2.H2O --------> Caso4.2H2O

It should be heated at 373 K carefully to get gypsum.

Answer 2

Answer:

Chemical formula of Plaster of Paris.

CaSO₄. 1/2 H₂O

Preparation :

On heating Gypsum at 373 K Plaster of Paris is formed.

CaSO₄. 2 H₂O    ⇒ CaSO₄. 1/2 H₂O + 3/2 H₂O

Special precaution :

We shouldn't heat gypsum above 373 K else it will not form.