Colligative property

1. What is a colligative property? Use complete sentences.

2. Explain why freezing point of a solution depresses and boiling point elevates compared to the pure solvent. Use diagrams and complete sentences.

3. If the density of milk is 1.035 g/cm3 and the freezing point is -0.250 oC, calculate the Kf for milk. Assume the whipping cream is milk and therefore your pure
solvent is milk. The formula for sugar is C12H22O11. Use one dry 1 oz = 28.35 g. Show all your work!

4. How would using sodium carbonate effect the temperature depression? Explain your answer.

POST LABS QUESTIONS
5. A solution is prepared by dissolving 4.9 g of sucrose (C12H22O11) in 175 g of water. Calculate the freezing point of this solution.

6. The freezing point of t-butanol is 25.50 oC and has a Kf of 0f 9.1 oC/m. Usually t-butanol absorbs water on exposure to air. If the freezing point of a 10.0
g sample of t-butanol is 24.59 oC, how many grams of water present in the sample?

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