Question

Write chemical equation only for preparation of Plaster of Paris.

Answer 1

Caso4.1/2H2O ---> CaSO4.2H2O

Calcium sulphate HEMI hydrate gains one and a half molecules of hater to give gypsum which hardens in the presence of sodium chloride.

Answer 2

Preparation of Plaster of Paris:

• It is prepared by 'heating the gypsum' at the 'temperature of 373 K'.
• The reaction for preparation of the POP is given below:

$\mathrm{CaSO}_{4} \cdot 2 \mathrm{H}_{2} \mathrm{O} \rightarrow \mathrm{CaSO}_{4} \cdot \frac{1}{2} \mathrm{H}_{2} \mathrm{O}+\frac{3}{2} \mathrm{H}_{2} \mathrm{O}$

• The chemical name of the Plaster of Paris is calcium sulphate hemihydrate. It has most applications in hospitals, chemistry labs, and in building constructions.
• It is used to fix bone fractures. It is used to make toys, statues, and other decorative items.

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