General Science • ChemistryMedium
What is the chemical formula of Plaster of Paris, a hemihydrate of calcium sulfate?
A. CaSO4·2H2O
B. CaSO4·0.5H2O✓ Correct Answer
C. CaSO4·H2O
D. 2CaSO4·H2O
💡 Solution & Explanation
Plaster of Paris is chemically a calcium sulfate hemihydrate with the formula CaSO4·0.5H2O, formed by heating gypsum to a specific controlled temperature. The formula CaSO4·2H2O represents gypsum, which is the dihydrate form. Chemical formulas of common commercial compounds are frequently asked in general science sections.
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