CM-UY 1004 Lecture Notes - Lecture 15: Miscibility, Colligative Properties, Hemolysis
12 Dec 2017
School
Department
Course
Professor
Document Summary
Miscible: 2 liquids are completely soluble in each other. Fractional crystallization: separation of a mixture of substance into pure components on basis of differing solubilities. Lose a little but you"ve purified it. Solubility of gas in liquid is proportional to pressure of gas over solution (henry"s law) Colligative properties: properties that depend on number of solute particles in solution and not nature of solute particles. Fractional distillation > separate more volatile from least volatile molecules ideal solution > total pressure always equals 1. Boiling point elevation and freezing point depression. Adding something to solution decreases vapor pressure. When something freezes, it freezes pure (otherwise it"s harder) Osmotic: selective passage of solvent molecules through porous membrane from dilute solution to more concentrated one. Semipermeable membrane: allows passage of solvent molecules but blocks solute molecules. Osmotic pressure ( ): pressure required to stop osmosis. Isotonic solution: 2 solutions with same osmotic pressure separated by a semipermeable membrane.
