Identify the compound of calcium which is used for plastering of fractured bones with the help of chemical equation, describe how this compound is prepared. What special precaution should be taken during the preparation of this compound?
(i) The compound of calcium sulphate hemihydrate
(ii) This compound is prepared by heating of gypsum, a hydrated salt of calcium
(iii) During the preperation of this compound, temperature should be controlled carefully otherwise, anhydrous calcium sulphate (CaS04) will be formed.