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Question
Write an equation to show the reaction between plaster of Paris and water.
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Solution
\[\ce{\underset{Plaster of Paris}{CaSO4*1/2 H2O} + \underset{Water}{1 1/2 H2O} -> \underset{(sets as hard mass)}{\underset{Gypsum}{CaSO4*2H2O}}}\]
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