Question

A compound X is prepared from gypsum has the property of hardening when mixed with proper quantity of water.

(a) Identify the compound X.

(b) Write the chemical equation for its preparation.

(c) For what purpose is it used in hospitals?

Answer 1

(a) Plaster of Paris.

(b) $\underset{\text{Gypsum}}{CaS{O}_4.2H_{2}O}\stackrel{373K}{\to }\underset{\text{Plaster of Paris}}{CaS{O}_4.\frac{1}{2}{H}_{2}O}+\frac{3}{2}{H}_{2}O$

(c) It is used in hospitals for fixing fractures, supporting the bones in the right position.