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Write the matflematical form of Ra.oult'...

Write the matflematical form of Ra.oult' s law of relative lowering of vapour pressure.

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`(P^(0) - P)/(P^(0)) = (n_(2))/(n_(1) + n_(2)) (or) (P^(0) - P)/(P^(0)) = X_(B)`
(or) mole fraction of solute
`(P_(A)^(0) - P_(S))/(P_(A)^(0)) = (n_(2))/(n_(1) + n_(2))` .
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