At 20°C the vapour pressure of benzene (C6H6) is 76.0 mm Hg, and that of toluene (C7H8) is 21.8 mm Hg. Hence both components are volatile. What is the mole fraction of each component in an ideal solution of benzene and toluene that has a vapour pressure of 35.4 mm Hg at 20°C?
Answer the following questions about colligative properties:
-
a) At 20°C the vapour pressure of benzene (C6H6) is 76.0 mm Hg, and that of toluene
(C7H8) is 21.8 mm Hg. Hence both components are volatile. What is the mole fraction of each component in an ideal solution of benzene and toluene that has a vapour pressure of 35.4 mm Hg at 20°C?
-
b) List the following solutions in order of decreasing freezing point: 0.04 molal glycerol (C3H8O3); 0.025 molal KBr; 0.030 molal phenol (C6H5OH).
3.
Complete each of the following questions with increases, decreases or does not change:
a) If the intermolecular forces in a liquid increase, the normal boiling point of the
liquid...
b) If the intermolecular forces in a liquid decrease, the vapour pressure of the liquid...
c) If a non-volatile solute is added to a liquid solvent, the vapour pressure of the
solvent...
d) If the temperature of a liquid increases, the equilibrium vapour pressure...
Trending now
This is a popular solution!
Step by step
Solved in 3 steps
