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Solutions

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Benzene and toluene form nearly ideal solutions. At 20^o C, the vapour pressure of benzene is 75 torr and that of toluene is 22 torr. The partial vapour pressure of benzene at 20^o C for a solution containing 78 g of benzene and 46 g of toluene in torr is

50

25

37.5

53.5

Solution

A.

50

straight P subscript straight B space equals space straight P subscript straight B superscript straight o space straight x space straight B space equals space 75 space straight x space fraction numerator 1 over denominator 1.5 end fraction space equals space 50 space torr

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