1.

Which one of the following is an expression of Raoult's law if P_(A) is the partial pressure of the solvent in a solution,P_(A)^(0) is the partial pressure of the pure solvent and if x_(A) and x_(B) are the mole fraction of the solute and the solvent repectively?

Answer»

`P_(A)=P_(A)^(@) X_(A)`
`P_(A)=P_(A)^(@) X_(A)(1//X_(B))`
`P_(A)=P_(A)^(@)X_(B)`
`P_(A)^(@)=P(X_(A)//X_(B))`

Solution :by def. of raoult's law `P_(A)=P_(0)^(A) X_(B)`
(Note that `X_(B)` is the mole FRACTION of the solvent in the solution.)


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