Concept explainers
Interpretation:
The freezing points of wine and vodka have to be calculated.
Concept Introduction:
Freezing point depression:
The lowering of the vapor pressure of a solvent by a solute leads to a lowering of the freezing point of the solution relative to that of the pure solvent. This effect is called as the freezing point depression. The mathematical relationship is given below.
Where,
Answer to Problem 16.70P
The freezing points of wine and vodka are
Explanation of Solution
The value of
Wine and vodka are about
Given that, the densities of ethanol and water are
The mass of ethanol and water in wine and vodka can be calculated as given below.
The colligative molality of wine and vodka can be calculated as given below.
The colligative molality and molality are same for ethanol.
Now, using the freezing point depression expression, the freezing points of wine and vodka can be calculated.
For wine:
For vodka:
The value of
Therefore, the freezing points of wine and vodka are
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Chapter 16 Solutions
General Chemistry
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