What is the total vapor pressure of the solution at this temperature? A solution

Question

What is the total vapor pressure of the solution at this temperature?

A solution contains a mixture of substance A and substance B, both of which are volatile. The mole fraction of substance A is 0.48. At 32 ?C the vapor pressure of pure A is 98 mmHg and the vapor pressure of pure B is 145 mmHg.

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A solution contains a mixture of substance A and substance B, both of which are volatile. The mole fraction of substance A is 0.48. At 32 ?C the vapor pressure of pure A is 98 mmHg and the vapor pressure of pure B is 145 mmHg.

Explanation / Answer

Solution:

1) Calculate the mole fraction of each substance:

Mole fraction of A ? 0.48

Mole fraction of B ? 0.52

2) Use Raoult's Law:

Ptotal = P

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