what is the chemical formula of plaster of paris ? how is it prepared ? state the chemical name and the compound formed when plaster mixed with water
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Chemical formula of Plaster of paris ( Cacium Sulphate Hemihydrate) is CaSo4.1/2 H2o .
It is obtained by heating gypsum (Caso4.2H20) at 373K At this temprature ,gypsum loses water molecules and forms plaster of paris .
Plaster of Paris is a white powder and on mixing with water ,it changes to gypsum giving a hard solid mass.
Caso4. 1/2H2O (plaster of paris) +3/2H2O = CaSo4.2H2O (gypsum)
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