Final answer:
The boiling point of the solution is higher than the boiling point of pure water, while the freezing point of the solution is lower than the freezing point of pure water due to the presence of calcium chloride. Calcium chloride is more effective at lowering the freezing point of the solution because it forms three ions per formula unit when it dissolves in water.
Step-by-step explanation:
The boiling point elevation and freezing point depression both show how the boiling and freezing points of a solution differ from those of the pure solvent. In the case of a solution of water and calcium chloride, the boiling point of the solution is higher than the boiling point of pure water, while the freezing point of the solution is lower than the freezing point of pure water. This is because calcium chloride dissolves in water to form three ions per formula unit, making it more effective at lowering the freezing point of the solution.