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1.     What are colligative properties? Give the definition and examples of a few.

2.     What is the Kf value of water?

3.     How does the number of osmoles from the van't Hoff equation factor in when trying to calculate the molar mass of a substance?

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experiment. Use this data to determine the molar mass of each compound, calculated using stoichiometry. Table 1: Freezing Point Temperatures m_ Amount Solute Added Freezing Point (°C) 0. 025 kg H20 Glycerol (C3H303) 0.025 kg H20 5 mL -4.2 NaCl 0.025 kg H20 2 g -5.1 CaC|2 0.025 kg H20 2 g -4.3 The density of glycerol is equal to 1.26 g/mL

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1.     Determine the molar mass of NaCl, CaCl2, and glycerol based on your experimental freezing points. 

2.     How do each of these molar masses compare to the theoretical? Calculate your percent error for all three compounds. 

3.     Describe any deviations from the experimental procedures which may have contributed to the molar masses being different than the theoretical.

4.     Which solution of salt (NaCl or CaCl2) is better to salt the roads based on cost and freezing point depression per amount of salt? Use the data in this experiment to explain your reasoning.

5.     What is the concentration of the exact composition of the rock salt/water solution used on icy roads?

6.     How would the results from this experiment differ if water did not form hydrogen bonds?

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