Acids, Bases & Salts (C10)

A compound which is prepared from gypsum has the property of hardening when mixed with a proper quantity of water. Identify the compound and write its chemical formula. Write the chemical equation for its preparation. Mention any one use of the compound.


The name of the compound is Plaster of Paris.

Its chemical formula is CaSO4.½H2O


CaSO4.2H2O  ------> CaSO4.½H2O + 1½ H2O

It is used in the hospitals mainly as plaster for supporting fractured bones in the right position.