Q14 of 53 Page 60

Show the decomposition of gypsum to P.O.P. and back interconversion of P.O.P. of gypsum.

The decomposition of gypsum to Plaster Of Paris is as follows:-


CaSO4.2H2O CaSO4.1/2H2O


Plaster of Paris is prepared by decomposing gypsum at 373K.


Interconversion of Plaster Of Paris into gypsum is as follows:-


CaSO4.1/2H2O + 1H2O CaSO4.2H2O


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