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Plaster of Paris - (CaSO4).2H2O

Preparation
 
Calcium sulphate hemihydrate is called Plaster of Paris.
 
 
It is prepared by heating gypsum at 393K when it gets dehydrated to Plaster of Paris.
 
Uses
  • It is used for making blackboard chalks.
  • It is also used for making statues.




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