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Question
State the common and chemical names of the compound formed when plaster of Paris is mixed with water.
Solution
When plaster of Paris is mixed with water, it settles into a hard mass to form gypsum (common name). The chemical name of gypsum is calcium sulphate dihydrate. `CaSO_4. 1/2H_2O + 1 1/2 H_2O -> Ca SO_4. 2H_2O`
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