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

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

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Explain —

Plaster of Paris is calcium sulphate hemihydrate $\left({CaSO}_4 \cdot \frac{1}{2} {H}_2 {O}\right)$.

On exposure to moisture it absorbs moisture and becomes gypsum $\left({CaSO}_4, 2 {H}_2 {O}\right)$ which does not have the required setting property.

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