Solutions 1.25.12 - Copy

Solutions 1.25.12 - Copy - point is depressed by 0.31C....

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Susie Lee Solutions SI sessions Susie.lee714@hotmail.com Sun 7-8p HECC 202 1/25/12 Mon 7-8p HECC 202 Wed 7-8p HECC 202 1. How does the number of solute particles compare if beaker one contains glucose dissolved in water and beaker two contains NaCl dissolved in water? How about CaCl 2 dissolved in water? 2. What is the van’t Hoff factor ? How does solute concentration affect it? What formulas are associated with it? 3. What is a colloid ? What are its properties ? 4. Describe a surfactant . PRACTICE PROBLEMS: 1. Calculate the osmotic pressure of a 0.0120M solution of NaCl in water at 0 o C. Assume the van’t Hoff factor is 1.94 for this solution. 2. When 18.0 grams of a substance is dissolved in 500 grams of water, the freezing
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Unformatted text preview: point is depressed by 0.31C. What is the molar mass of the solute? 3. Which of the following solutions would be expected to experience the largest deviation from the expected van't Hoff factor? a. 1.5 M NaCl Susie Lee Solutions SI sessions Susie.lee714@hotmail.com Sun 7-8p HECC 202 1/25/12 Mon 7-8p HECC 202 Wed 7-8p HECC 202 b. 1.0 M glucose c. 0.010 M NaCl d. 0.5M CH 3 OH e. Both sodium chloride solutions would have the same deviation 4. The freezing point depression of a 0.10 m solution of HF(aq) solution is -0.201 C. Calculate the percent dissociation of HF(aq)....
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Solutions 1.25.12 - Copy - point is depressed by 0.31C....

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