5. Identify the compound of calcium which is used for plastering of fractured bones. With the
help of chemical equation show how is it prepared and what special precautions should be
taken during the preparation of this compound change.
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It is plaster of Paris chemical formula is CaSO4.half H2O. it is prepared by gypsum
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Answer:
Chemical formula of Plaster of Paris.
CaSO₄. 1/2 H₂O
Preparation :
On heating Gypsum at 373 K Plaster of Paris is formed.
CaSO₄. 2 H₂O ⇒ CaSO₄. 1/2 H₂O + 3/2 H₂O
Special precaution :
We shouldn't heat gypsum above 373 K else it will not form.
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