1) What must be measured in order to determine the freezing point depression? 2. From a list of solutions with similar molalities, how could you quickly determine which would have the highest boiling point? 3. Why would table salt not be a good solution to use when deicing a plane? 4. Identify which of the following statements are true. When a solute is added to a solution, i. the boiling point increases, ii. the boiling point decreases, lil, the freezing point increases, iv. the freezing point decreases. a i and ill are true b. i and iv are true c. li and lil are true d. ii and iv are true 5. if 25.0 g of sucrose (C12H2201 1) is added to 500. g of water, the boiling point is increased by what amount? (Ka (water)=0.52 C/m) a. 0.076 b. 0.025 C. 26 d. None of these 6. The solubility of seawater (an aqueous solution of NaCl) is approximately 0.50 m. Calculate the freezing point of seawater. (K, (water) = 1.86 C/m) a.-0.93 b. 0.93 C. 1.86 d. -1.86 lowest freezing point

d. -1.86 7. Determine which of the following solutions would have the lowest freezing point. a. 15 g of ammonium nitrate in 100. g of water. b. 50. g of glucose in 100.g of water. c. 35 g of calcium chloride in 150. g of water. 8. A 135.0 g sample of an unknown nonelectrolyte compound is dissolved in 725 g of water. The boiling point of the resulting solution was found to be 106.02 C. What is the molecular weight of the unknown compound? 9. Calcium chloride is known to melt ice faster than sodium chloride but is not used on roads because the salt itself attracts water. If 15 g of CaCl2 was added to 250 g of water, what would be the effect on the freezing point of the solution? (K, (water) = 1.86'C/m)

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