what is the chemical name and fourmula of p.o.p, how is it prepared what happens when temprature risies more than 100'c.why is it collected in a polithin bag?
Answers
Answer:
Plaster of Paris is calcium sulphate hemihydrate. Its chemical formula is: CaSO4.21H2O.
It is prepared by heating gypsum to a temperature of 1000C in a kiln. It loses 3/4th of its water of crystallisation and forms plaster of Paris.
GypsumCaSO4.2H2OHeat at 100⁰C or 373kPlaster of parisCaSO4.21H2O+water121H2O
Plaster of Paris should be stored in a moisture-proof container because the presence of moisture can cause the slow setting of the plaster of Paris by bringing about its hydration.
Uses of plaster of Paris:
(i) It is used as a fire proofing material.
(ii) it is used in hospitals for setting fractured bones in the right position to ensure correct healing.
Plaster of Paris is calcium sulphate hemihydrate. Its chemical formula is: CaSO4.21H2O. It is prepared by heating gypsum to a temperature of 1000C in a kiln. It loses 3/4th of its water of crystallisation and forms plaster of Paris.
GypsumCaSO4.2H2O Heat at 100⁰C or
373k Plaster of paris
CaSO4.21H2O+water121H2O
Plaster of Paris should be stored in a moisture-proof container because the presence of moisture can cause the slow setting of the plaster of Paris by bringing about its hydration.
Uses of plaster of Paris :-
- It is used as a fire proofing material.
- It is used in hospitals for setting fractured bones in the right position to ensure correct healing.