Question

State the effect of heat on gypsum and limestone

Answer 1

When gypsum is heated it looses its water of crystallization and forms CaSO4 and 2H2O.
When limestone is heated it gives white CaO and a gas which turns lime water milky CO2

Answer 2

Answer: The equations for the effect of heat on gypsum and limestone is given below.

Explanation:

1. When gypsum is heated, it looses its water of crystallization and form Plaster of Paris. The equation for the above reaction follows:

$CaSO_4.2H_2O\overset{400K}\rightarrow CaSO_4.\frac{1}{2}H_2O+\frac{3}{2}H_2O$

2. When limestone having formula $(CaCO_3)$ is heated, it leads to the formation of calcium oxide and carbon dioxide. The equation for the above reaction follows:

$CaCO_3(s)\rightarrow CaO(s)+CO_2(g)$