Question

What is the common name of ${\mathrm{CaSO}}_4.\frac{1}{2}{\mathrm{H}}_2\mathrm{O}$? Also name the compound from which it is prepared.

Answer 1

The common name of ${\mathrm{CaSO}}_4.\frac{1}{2}{\mathrm{H}}_2\mathrm{O}$ is plaster of paris. Plaster of paris is obtained by heating gypsum(CaSO₄.2H₂O) at 373 K.