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The vapour pressure of pure liquid A and...

The vapour pressure of pure liquid A and pure liquid B at `20^(@)C` are 22 and 75 mm of Hg respectively. A solution.

Text Solution

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The correct Answer is:
48.5mm
`x_(A)=1/(1+1)=0.5,x_(B)=1/(1+1)=0.5`
`"Vapour pressure of liquid A in solution "(P_(A))=P_(A)^(@)x_(A)=(22mm)xx0.5=11mm`
`"Vapour pressure of liquid B in solution "(P_(B))=P_(B)^(@)x_(B)=(75mm)xx0.5=37.5 mm.`
`"Vapour pressure of the soution"P=P_(A)+P_(B)=(11+37.5)=48.5mm.`
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