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The Colligative Properties

Q. At 40oC, the vapor pressure of pure cyclohexane, (C6H12) is 185 torr, while the vapor pressure of pure toluene (C7H8) is 59 torr. What is the vapor pressure of a solution made by combining 50 grams of each of the liquids?

Solved • May 6, 2020

The Colligative Properties

Q. Calculate the vapour pressure at 25 °C of an aqueous solution that is 5.50% NaCl by mass. (Assume complete dissociation of the solute.)

Solved • May 4, 2020

The Colligative Properties

Q. Which factor affects the vapor pressure of a liquid? a) surface area of the liquid b) temperature c) atmospheric pressure d) volume of the liquid

Solved • Apr 30, 2020

The Colligative Properties

Q. A nonvolatile organic compound Z was used to make up a solution. Solution A contains 8.00 g of Z dissolved in 100 g of water and has a vapor pressure of 754.5 mmHg at the normal boiling point of water. Calculate the molar mass of Z in solution A.

Solved • Apr 29, 2020

The Colligative Properties

Q. How many grams of sucrose (C12H22O11) must be added to 609 g of water to give a solution with a vapor pressure 0.965 mmHg less than that of pure water at 20°C? (The vapor pressure of water at 20°C is 17.5 mmHg.)

Solved • Apr 29, 2020

The Colligative Properties

Q. The osmotic pressure of 1.29 × 10−2 M solutions of CaCl2 and urea at 25°C are 0.778 and 0.315 atm, respectively. Calculate the van't Hoff factor for the CaCl2 solution.

Solved • Apr 29, 2020

The Colligative Properties

Q. An aqueous solution contains the amino acid glycine (NH2CH2COOH). Assuming that the acid does not ionize in water, calculate the molality of the solution if it freezes at −2.91°C. The freezing point depression constant for water is 1.86°C/m.

Solved • Apr 29, 2020