What is a chemical formula for plaster of paris? How is it prepared? State the common and chemical name of the compound formed when plaster of paris is mixed with water. Why is plaster of paris is stored in air tight containers? [3]?
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The chemical formula of plaster of paris is CaSO4.1/2H2O .It is formed when Gypsum(CaSO4.2H2O)is heated at 100°C .
When we add water to plaster of paris(CaSO4.1/2H2O + 1-1/2H2O ----------->CaSO4.2H2O),it lead to the formation of Gypsum
Plaster of paris is kept in air tight containers because the water molecules present in air react with it and due to this it lead to the formation of Gypsum
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