Question

A compound of calcium is used in hospitals for setting fractured bones. (a) Which is that compound ? Write its chemical name and formula ? (b) How is it prepared ?

Answer 1

Calcium sulphate (CaSo4) is used as plaster in making buildings and in fractured bones . It is prepared by reacting normal marble or limestone with sulphuric acid CaCo3 + H2So4 =CaSo4 + H20+Co2

Answer 2

Explanation:

• For a:

The compound of calcium that is used for setting fractured bones in the hospitals is known as Plaster of Paris.

Chemical name for Plaster of Paris is Calcium sulfate hemihydrate and the formula for this compound is $CaSO_4.\frac{1}{2}H_2O$

• For b:

It is prepared when a compound named gypsum is heated at 373K and it looses water of crystallization in this process.

The equation for the above reaction follows:

$CaSO_4.2H_2O\overset{373K}\rightarrow CaSO_4.\frac{1}{2}H_2O+\frac{3}{2}H_2O$