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Plaster of Paris should be stored in a m...

Plaster of Paris should be stored in a moisture-proof container. Explain why?

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Plaster of Paris in contact with moisture (water ) changes to solid hard mass , gypsum .therefore , it gets wasted .Hence , it should be stored in moisture proof containers .
`underset("Plaster of Paris")(CaSO_(4).(1)/(2)H_(2)O)+(3)/(2)H_(2)Otounderset("Gypsum")(CaSO_(4).2H_(2)O)`
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(a) What are the common names of . (a) CaOCl_(2) , and (b) Na_(2)CO_(3)10H_(2)O ? (b) Why should plaster of Paris be stored in a moisture-proof container? (c) Explain why, while diluting a concentrated acid, acid should be added to water and not water to the acid.

(a). What is plaster of paris? Write the chemical formula of plaster of paris. (b) How is plaster of paris prepared? Write chemical equation of the reaction involved. (c) Explain why plaster of paris should be stored in a moisture-proof container. (d) State two important uses of plaster of paris.

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