Question

7. Chemical formula and chemical name of plaster of Paris are _______ and ______ respectively.

• A. ${\mathrm{CaSO}}_4.\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.{\mathrm{H}}_2\mathrm{O}$
• B. Calcium sulphate hemihydrate

Answer 1

• The chemical name for Plaster of Paris is Calcium sulphate hemihydrate.
• The chemical formula for the given compound will be $CaS{O}_{\mathit{4}}.2H_{2}O$.
• It is quick setting gypsum plaster which has finely powdered Calcium sulphate hemihydrate which gets hard when comes in contact with moisture.