13_lect_prob_2

13_lect_prob_2 - The osmotic pressure of the solution at...

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Chem 125 Dr. Retsek Winter 2008 Ch. 13 Lecture Examples, Part 2 8. What is the minimum molality of an ethylene glycol (C 2 H 6 O 2 – antifreeze) solution (in water) that will protect the solution from freezing at -18°C? K f for water is 1.86°C/ m . 9. An aqueous solution was made by dissolving 3.50 mg of protein in sufficient water to make 5.00 mL of solution.
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Unformatted text preview: The osmotic pressure of the solution at 25C was 1.54 torr. What it the molar mass of the protein? 10. A solution is 1.0 mole benzene (C 6 H 6 ) and 2.0 moles of toluene (C 7 H 8 ). Given the vapor pressure of pure benzene is 75 torr and pure toluene is 22 torr, what is the mole fraction of each in the vapor phase?...
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