Changes saveu 16. Choose the statement that defines freezing point depression. an increase in the freezing point of a solvent when a solute is added to it an increase in the freezing point of a solute when a solvent is added to it a decrease in the freezing point of a solvent when a solute is added to it a decrease in the freezing point of a solute when a solvent is added to it

Changes saveu 16. Choose the statement that defines freezing point depression. an increase in the freezing point of a solvent when a solute is added to it an increase in the freezing point of a solute when a solvent is added to it a decrease in the freezing point of a solvent when a solute is added to it a decrease in the freezing point of a solute when a solvent is added to it

Chemistry: Principles and Reactions

8th Edition

ISBN:9781305079373

Author:William L. Masterton, Cecile N. Hurley

Publisher:William L. Masterton, Cecile N. Hurley

Chapter10: Solutions

Section: Chapter Questions

Problem 31QAP: Vodka is advertised to be 80 proof. That means that the ethanol (C2H5OH) concentration is 40% (two...

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A 12.0-g sample of a nonelectrolyte is dissolved in 80.0 g of water. The solution freezes at -1.94 C. Calculate the molar mass of the substance.
You have read that adding a solute to a solvent can both increase the boiling point and decrease the freezing point. A friend of yours explains it to you like this: The solute and solvent can be like salt in water. The salt gets in the way of freezing in that it blocks the water molecules from joining together. The salt acts like a strong bond holding the water molecules together so that it is harder to boil. What do you say to your friend?
A compound of cobalt, carbon, and oxygen contains 28.10% C and 34.47% Co. When 0.147 g of this compound is dissolved in 6.72 g of cyclohexane, the solution freezes at 5.23C. What is the molecular formula of this compound?
Which of the following will have the lowest total vapor pressure at 25C? a. pure water (vapor pressure = 23.8 torr at 25C) b. a solution of glucose in water with C6H12O6=0.01 c. a solution of sodium chloride in water with NaCl = 0.01 d. a solution of methanol in water with CH3OH=0.2 (Consider the vapor pressure of both methanol [143 torr at 25C] and water.)
An aqueous solution of a molecular compound freezes at 0.086C. What is the molality of the solution?
Sodium chloride (NaCl) is commonly used to melt ice on roads during the winter. Calcium chloride (CaCl2) is sometimes used for this purpose too. Let us compare the effectiveness of equal masses of these two compounds in lowering the freezing point of water, by calculating the freezing point depression of solutions containing 200. g of each salt in 1.00 kg of water. (An advantage of CaCl2 is that it acts more quickly because it is hygroscopic, that is. it absorbs moisture from the air to give a solution and begin the process. A disadvantage is that this compound is more costly.)