Colligative_Properties

Colligative_Properties - Colligative Properties 1....

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Colligative Properties 1. Calculate the vapor pressure lowering when 10.0 mL of glycerol (C 3 H 8 O 3 ) is added to 50.0 mL of water at 50.0 C. At this temperature, the vapor pressure of pure water is 92.5 torr and its density is 0.988 g/mL. The density of glycerol is 1.26 g/mL. 2. You add 1.00 kg of ethylene glycol (C 2 H 6 O 2 ) to your car radiator which contains 4450 g of water. What are the boiling and freezing points of the solution? 3. A solution of 7.01 g of carbohydrate in 100.0 mL of water has an osmotic pressure of 4.01 atm at 20.0 C. Calculate the molar mass of the carbohydrate. 4. A physician studying a type of hemoglobin formed during a fatal disease dissolves 21.5 mg of the protein in water at 5.0 C to make 1.50 mL of solution in order to measure its osmotic pressure. At equilibrium, the sollution has an osmotic pressure of 3.61 torr. What is the molar mass of the hemoglobin? 5. Rank the following aqueous solutions - (I) 0.100 m NaNO 3 ; (II) 0.200 m glucose; (III) 0.100 m CaCl 2 - in order of increasing (a) osmotic pressure (b) boiling point (c) freezing point (d) vapor pressure at 50 C. 6.
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Colligative_Properties - Colligative Properties 1....

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