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प्रश्न
Show that for a dilute solution `Delta p = (wM)/(WM') xx p^circ`
where, w = mass of solute, W = mass of solvent, M' = molecular mass of solute. M = molecular mass of solvent and p° = vapour pressure of pure solvent.
व्युत्पत्ती
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उत्तर
According to Raoult’s law, for a dilute solution,
`(p^circ - p)/p^circ = (w M)/(W M')`
or `(Delta p)/p^circ = (w M)/(W M')`
or `Delta p = p^circ M xx w/(W M')`
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