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3 cards from this section. Quick, good the night before a test.
What is freezing point depression?
Think about what happens when salt is added to ice.
What does Kf represent?
Remember, it varies with different solvents.
What happens to the freezing point of a solvent when a non-volatile solute is added?
Think about what occurs with added salt in winter.
True or False: Colligative properties depend on the nature of the solute.
Remember discussions about solute particle counts.
Determine the molar mass of a solute if a solution containing 1.5 kg of solution, which is 3% by mass of the solute, has a freezing point depression of 1°C. Assume Kf for the solvent is 1.86 K kg mol-1.
Use the relationships among mass percentage, freezing point depression, and molarity.
A chemist dissolves 80 g of a non-volatile solute in 200 g of water. The freezing point of the solution is measured at -2.5 °C. Determine the Kf of water assuming complete solubility.
Use relationships between freezing point depression and molality.
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