Question

Plaster of Paris is :
(a) CaSO₄.2H₂O
(b) CaSO₄.H₂O
(c) CaSO₄.$\frac{1}{2}$H₂O
(d) CaSO₄.4H₂O

Answer 1

⭐《QUESTION》

↪Formula for the Plater of Paris?

⭐《ANSWER》

↪Actually welocme to the concept of the WATER OF CRYSTALLIZATION

↪Since we know that, plaster of Paris is Calcium Sulphate compound,

↗which becomes harder when the water is lost from it ..

↪The formula for the POP is

↪CaSO4.1/2H2O or ↪2CaSO4.H2O or

↪CaSO4.(0.5)H2O

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Answer 2

$\sf{\Large {\underline {SALTS\:AND\:THEIR\:USES}}}$ :

Plaster of Paris ( P. O. P.) is

( c ). CaSO₄. $\frac{1}{2}$H₂O

Actually, half water of crystallisation is attached to the Calcium Sulphate ( CaSO₄ ).

$\sf{\large {\underline {REACTION}}}$ :

CaSO₄ . $\frac{1}{2}$ H₂O ( P. O. P. ) + 1 $\frac{1}{2}$ H₂O

( Water ) ➝ CaSO₄ . 2H₂O ( Gypsum ).

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