really Picos!
A sulphate salt which is a white, soft substance can be moulded into different shapes by making
its dough, when this compound is left in open for some time, it becomes a solid mass and cannot
be used for moulding purposes. Identify the sulphate salt and why does it show such a
behaviour? Give the reaction involved.
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Calcium sulphate is a white soft substance. It is known as Plaster of Paris, which can be moulded into different shapes by making its dough. When Plaster of Paris is left for some time in open, it turns into solid mass because of reaction with moisture present in the atmosphere.
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