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Chap 14 practice problems

# Chap 14 practice problems - EXAM PRACTIVE QUESTIONS Chapter...

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EXAM PRACTIVE QUESTIONS Chapter 14 1. How many grams of sucrose (C 12 H 22 O 11 ) must be dissolved in 750. mL of water to prepare a 0.250 molal solution? 2. If the mole fraction of CH 3 OH in a solution with only water is 0.0250, what is the molality of the CH 3 OH? 3. In a home ice cream freezer, we lower the freezing point of the water bath surrounding the ice cream by dissolving NaCl in water to make a brine solution. A 15.0% brine solution is observed to freeze at -10.888 ° C. What is the van't Hoff factor, i , for this solution? 4. Indicate (by writing yes or no in the blanks below) which of the following pairs will form a solution when mixed. KI in CCl 4 _________ LiF in water _________ CH 3 OH in water _________ CH 3 OH in C 6 H 6 _________ vegetable oil in mineral oil _________ 5. What is the vapor pressure of an aqueous solution containing 10.0% ( w/w ) ethylene glycol (62.0 g/mol) at 25 ° C. P H2O = 24.3 torr at 25 ° C. 6.

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Chap 14 practice problems - EXAM PRACTIVE QUESTIONS Chapter...

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