Solutions 1.25.12 - Copy

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

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Susie Lee Solutions SI sessions [email protected] 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 0.31°C. 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 [email protected] 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 0.31°C...

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