Question

Write the common name and the chemical name of the compound CaSO₄ · ½H₂O. Write the method of its preparation. Give chemical equation for the reaction, when water reacts with CaSO₄ · ½H₂O.

Write an equation to show the reaction between Plaster of Paris and water.

Plaster of Paris should be stored in a moisture-proof container. Explain why?

A compound which is prepared from gypsum has the property of hardening when mixed with proper quantity of water. Identify the compound. Write chemical equation to prepare the compound. Mention one important use of the compound.