Match the following aqueous solutions with the appropriate letter from the column on the right.
1. 9.3E-2 m Al(CH3COO)3 A.Highest boiling point
2. 0.14 m (NH 4)2SO4 B.Second highest boiling point
3. 0.23 m AgNO3 C.Third highest boiling point
4. 0.40 m Sucrose (nonelectrolyte) D.Lowest boiling point
We have to rank the given solutions based on their boiling points. We can do so by calculating the boiling points of these solutions.
When a nonvolatile solute is added to a volatile solvent the boiling point of the resulting solution is greater than the boiling point of the pure solvent. This is known as boiling point elevation.
We can calculate boiling point elevation using this formula:
i = van ’t Hoff constant
Kb = ebullioscopic constant
m = molality of solution
ΔTb is the difference between the boiling point of solution (T2) and the boiling point of water (T1).