Colligative Properties

We are given:
- (Boiling point elevation constant),
- (The solute dissociates into 3 moles of particles),
- .
The formula for boiling point elevation is: Substituting the given values: Thus, the elevation of boiling point is .

We are given:
- Boiling point of pure solvent = 353.3 K
- Melting point of pure solvent = 278.6 K
When a solute is dissolved, the following changes occur:
- The boiling point increases (boiling point elevation).
- The melting point decreases (freezing point depression).
Since the solute is non-volatile and non-electrolyte, the change in both boiling and melting points can be calculated using the colligative properties formulas:
- (boiling point elevation),
- (freezing point depression).
Here, is the van’t Hoff factor, which is 1 for non-electrolytes, and is the molality.
After applying the equations, the corrected values for boiling and melting points are:
- Boiling point = 354.11 K
- Melting point = 279.2 K
Thus, the answer is for boiling point and for melting point.