EXPLAIN THE PREPERATION OF PLASTER OF PARIS??
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Calcium sulphate with half a molecule of water per molecule of the salt (hemi-hydrate) is called plaster of paris (plaster of paris). It is prepared by heating gypsum (CaSO4. 2H2O) at 120°C in rotary kilns, where it gets partially dehydrated.
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by pyrochemical phenomenon
Explanation:
By careful heating of gypsum (CaSO4.2H20) at 373k
It losses water molecules partially i.e, incompletely to become POP-plaster of paris
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