CBSE Class 10 Answered
Give reaction for the formation of plaster of paris.Give reason why is calcium sulphate hemihydrate called 'plaster of Paris'??
Asked by guptaabhinav0809 | 06 Sep, 2018, 09:45: PM
Expert Answer
Plaster of Paris is prepared by heating gypsum at 373 K. On heating, it loses water molecules and becomes calcium sulphate hemihydrate (CaSO4.1/2 H2O) which is called Plaster of Paris.
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CaSO4.2H2O → CaSO4. ½ H2O + 1 ½ H2O Gypsum Plaster of Paris |
Plaster of Paris was first widely used in Paris, and it became the center of plaster production. Thus it got its name.
9000 years ago houses are made of woods, in order to protect them from fire, a coating of plaster was made on the walls.
First, this application of POP was started in Paris and it became the center of plaster production, thus it is known as Plaster of Paris.
Answered by Ramandeep | 07 Sep, 2018, 11:43: AM
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