Ask Questions, Get Answers

Want to ask us a question? Click here
Browse Questions
Home  >>  AIMS  >>  Class12  >>  Chemistry  >>  Liquid Solutions
0 votes

What is the composition of the vapour which is in equilibrium at $30^{\large\circ}C$ with a benzene-toluene solution with a mole fraction of benzene of 0.400? ($P_B^0$ = 119 torr and $P_T^0$ = 37.0 torr)

Can you answer this question?

1 Answer

0 votes
Total pressure of the solution is given by
$P_T = X_BP_B^0 + X_T P_T^0$
$\Rightarrow 0.4 \times 119 + 0.6 \times 37 $
$\Rightarrow 47.6 + 22.2 $
$\Rightarrow 69.8 torr$
Applying Dalton’s law for mole fraction in vapour phase, $Y_B=\large\frac{P_B}{P_T}=\frac{47.6}{62.4}$$=0.763$
Hence (A) is the correct answer.
answered Jun 9, 2014 by sreemathi.v

Related questions

Ask Question
student study plans
JEE MAIN, CBSE, NEET Mobile and Tablet App
The ultimate mobile app to help you crack your examinations
Get the Android App