How is gypsum different from plaster of paris chemically
Asked by admin @ in Chemistry viewed by 281 People
How is plaster of Paris chemically different from gypsum ? How may they be interconverted ? Write one use of plaster of Paris.
Answered by admin @
Plaster of paris (POP) has chemical formula CaSO4. 1/2 H2O which is produced by heating gypsum having chemical formula CaSO4.2 H2O at 373 kelvin.
the reaction is--
CaSO4. 1/2 H2O (POP) + 1 and 1/2 H2O -----------> CaSO4.2 H2O (gypsum)
heating gypsum gives POP and adding water to POP gives gypsum as shown in the reaction above.
Plaster of Paris is used for making toys, materials for decoration, and for making smooth surfaces.
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