Problem: At 20 oC the vapor pressure of benzene C6H6 is 75 torr and that of toluene C7H8 is 22 torr. Assume that benzene and toluene form an ideal solution.In a solution composed of benzene and toluene that has a vapor pressure of 36  torr at 20 oC, what is the mole fraction of toluene?

FREE Expert Solution
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FREE Expert Solution

Recall that the partial pressure of a solution in a mixture is given by:

$\overline{){{\mathbf{P}}}_{{\mathbf{solution}}}{\mathbf{=}}{{\mathbf{\chi }}}_{{\mathbf{solvent}}}{{\mathbf{P}}}_{{\mathbf{solvent}}}}$

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Problem Details

At 20 oC the vapor pressure of benzene C6H6 is 75 torr and that of toluene C7H8 is 22 torr. Assume that benzene and toluene form an ideal solution.

In a solution composed of benzene and toluene that has a vapor pressure of 36  torr at 20 oC, what is the mole fraction of toluene?

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Our tutors have indicated that to solve this problem you will need to apply the The Colligative Properties concept. You can view video lessons to learn The Colligative Properties Or if you need more The Colligative Properties practice, you can also practice The Colligative Properties practice problems .

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