Question
Chemistry Question on Types of Solutions
The vapour pressure of a solvent decreased by 10 mm o f mercury when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. What should be the mole fraction of the solvent if the decrease in the vapour pressure is to be 20 mm o f mercury?
A
0.4
B
0.6
C
0.8
D
0.2
Answer
0.6
Explanation
Solution
Answer (b) 0.6