Lect+11+08 - Lecture 11 Solutions Colligative Properties...

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Lecture 11 - Solutions Colligative Properties Osmotic Pressure Henry’s Law Mixtures and Distillations Colloids
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Osmotic Pressure Transport of solvent through semipermeable membranes 2200 π = ρ g h where ρ is density, g is the gravitation constant and h is the height Van’t Hoff’s 2200 π V = nRT so can determine molar mass from osmotic pressure
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Osmotic pressure The water solvent in the carrot is transported out of the carrot into the saturated salt solution in order to minimize total energy
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Colligative Properties 1. Boiling Point Elevation. 2. Vapor Pressure Lowering. 3. Freezing Point Depression. 4. Osmotic Pressure.
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Henry’s law Two component solution Even for non-ideal solutions at sufficiently low concentration • P 2 = k 2 X 2 Where k 2 is the Henry’s law constant What type of non- ideality is illustrated here?
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Fractional distillation Constant pressure heating of a two component solution.
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