Plaster of Paris () is manufactured by the controlled heating of Gypsum (). What is the strict temperature threshold required for this preparation to avoid destroying the setting property of the produ

Question

Plaster of Paris ($CaSO_4 \cdot \frac{1}{2}H_2O$) is manufactured by the controlled heating of Gypsum ($CaSO_4 \cdot 2H_2O$). What is the strict temperature threshold required for this preparation to avoid destroying the setting property of the product?

Prashant Kotian · Accepted Answer

Correct answer: C. Gypsum must be heated carefully to exactly (). The reaction is . If heated above this temperature, it loses all water and becomes dead burnt plaster.

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