Question

Identify the compound of calcium which is used for plastering 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 1

ANSWER:

The compound of calcium which is used for plastering of fractured bones is plaster of paris(CaOH2.1/2 H2O)

CaSO4.2 H2O (Gypsum) =CaSO4.1/2 H2O(POP) + 1 1/2 H2O

PRECAUTIONS :

Gypsum should not be heated more than 373k or else it will form calcium sulphate (CaSO4)

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.