# Problem: A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 256 torr. Pure pentane and hexane have vapor pressures of 425  torr and 151 torr, respectively, at room temperature.What is the mole fraction of hexane? (Assume ideal behavior.)

🤓 Based on our data, we think this question is relevant for Professor Ray's class at University of West Georgia.

###### FREE Expert Solution

Raoult's Law:

$\overline{){{\mathbf{P}}}_{{\mathbf{total}}}{\mathbf{=}}{{\mathbf{\chi }}}_{{\mathbf{pentane}}}{{\mathbf{P}}}_{{\mathbf{pentane}}}{\mathbf{+}}{{\mathbf{\chi }}}_{{\mathbf{hexane}}}{{\mathbf{P}}}_{{\mathbf{hexane}}}}$

###### Problem Details

A solution contains a mixture of pentane and hexane at room temperature. The solution has a vapor pressure of 256 torr. Pure pentane and hexane have vapor pressures of 425  torr and 151 torr, respectively, at room temperature.

What is the mole fraction of hexane? (Assume ideal behavior.)

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 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.

What professor is this problem relevant for?

Based on our data, we think this problem is relevant for Professor Ray's class at University of West Georgia.