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

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2. Acids, Bases and Salts

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

Option A

Option B

Option C

Option D

Solution

Plaster of Paris $(POP)$ should be stored in a moisture-proof container because Plaster of Paris, a powdery mass, absorbs water (moisture) to form a hard solid known as gypsum.

$\underset{(POP)}{\mathop{CaS{{O}_{4}}.\frac{1}{2}{{H}_{2}}O}}\,\,+1\,\frac{1}{2}{{H}_{2}}O\,\to \,\underset{Gypsum\,\,(Hard\,\,solid)}{\mathop{CaS{{O}_{4}}.2{{H}_{2}}O}}\,$

Standard 10

Science