# Problem: Two liquids, A and B, have vapor pressures at a given temperature of 24 mmHg and 36 mmHg, respectively. We prepare solutions of A and B at a given temperature and measure the total pressures above the solutions. We obtain the following data:SolutionAmt A (mol)Amt B (mol)P (mmHg)11130221283123241333Predict the total pressure above a solution of 1 mol  A and 5 mol B.

###### FREE Expert Solution
90% (415 ratings)
###### FREE Expert Solution

We’re being total pressure above a solution of 1 mol  A and 5 mol B.

Recall that the total pressure:

$\overline{){{\mathbf{P}}}_{{\mathbf{total}}}{\mathbf{=}}{{\mathbf{P}}}_{{\mathbf{A}}}{\mathbf{+}}{{\mathbf{P}}}_{{\mathbf{B}}}}$

Partial Pressures are equal to:

$\overline{){{\mathbf{P}}}_{{\mathbf{A}}}{\mathbf{=}}{{\mathbf{\chi }}}_{{\mathbf{A}}}{\mathbf{·}}\stackrel{\mathbf{\circ }}{{\mathbf{P}}_{\mathbf{A}}}}\phantom{\rule{0ex}{0ex}}\overline{){{\mathbf{P}}}_{{\mathbf{B}}}{\mathbf{=}}{{\mathbf{\chi }}}_{{\mathbf{B}}}{\mathbf{·}}\stackrel{\mathbf{\circ }}{{\mathbf{P}}_{\mathbf{B}}}}$

Mole fraction is given by:

90% (415 ratings)
###### Problem Details

Two liquids, A and B, have vapor pressures at a given temperature of 24 mmHg and 36 mmHg, respectively. We prepare solutions of A and B at a given temperature and measure the total pressures above the solutions. We obtain the following data:

SolutionAmt A (mol)Amt B (mol)P (mmHg)

11130221283123241333

Predict the total pressure above a solution of 1 mol  A and 5 mol B.

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 is the difficulty of this problem?

Our tutors rated the difficulty of Two liquids, A and B, have vapor pressures at a given temper... as low difficulty.

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What professor is this problem relevant for?

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