# Problem: A solution of methanol and water has a mole fraction of water of 0.312 and a total vapor pressure of 211 torr at 39.9oC. The vapor pressures of pure methanol and pure water at this temperature are 256 torr and 55.3 torr, respectively.What can you say about the relative strengths of the solute-solvent interactions compared to the solute-solute and solvent-solvent interactions?

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${\mathbf{P}}_{\mathbf{total}}\mathbf{=}{\mathbf{\chi }}_{\mathbf{methanol}}{\mathbf{P}}_{\mathbf{methanol}}\mathbf{+}\left(1-{\chi }_{\mathrm{methanol}}\right){\mathbf{P}}_{\mathbf{water}}$

95% (136 ratings) ###### Problem Details

A solution of methanol and water has a mole fraction of water of 0.312 and a total vapor pressure of 211 torr at 39.9oC. The vapor pressures of pure methanol and pure water at this temperature are 256 torr and 55.3 torr, respectively.

What can you say about the relative strengths of the solute-solvent interactions compared to the solute-solute and solvent-solvent interactions?

What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Solutions, Molarity and Intermolecular Forces concept. You can view video lessons to learn Solutions, Molarity and Intermolecular Forces. Or if you need more Solutions, Molarity and Intermolecular Forces practice, you can also practice Solutions, Molarity and Intermolecular Forces practice problems.

What is the difficulty of this problem?

Our tutors rated the difficulty ofA solution of methanol and water has a mole fraction of wate...as medium difficulty.

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Our expert Chemistry tutor, Sabrina took 6 minutes and 38 seconds to solve this problem. You can follow their steps in the video explanation above.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Ladon's class at TOWSON.