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Question
State the common and chemical names of the compound formed when plaster of Paris is mixed with water.
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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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