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eq tuahlon Show.hoc사 ls一ーspe cialouno |
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Answer» The compound is (Plaster of Paris) CaSO4.1/2H2O It is prepared by heating gypsum at 373K (Apx) in large steel pots. CaSO4.2H2O--> CaSO4.1/2H2O + 3/2H2O Gypsum. Heat plaster of Paris Precautions The temperature should be carefully controlled, if temperature is quite high gypsum will be fully dehydrated. And dehydrated gypsum is totally different from plaster of Paris. |
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