lab exam notes - Exp 1: Vaporization: turning a liquid to...

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Exp 1: Vaporization: turning a liquid to vapor ; condensation – turning a vapor to liquid. Simple distillation- sep liquids boiling below 150C at 1 atm from nonvolatile impurities or another liquid boiling at least 25C higher than the first. Liquids should dissolve Fractional distillation- sep liquid mixtures, soluble in each other that boil at less than 25C from each other at 1 atm. Azeotrope- a mixture with a constant boiling point. Ri(Sample) = x(toluene)ri(toluene) + x(cyclohexane)ri(cyclohexane) Hot gravity filtration- when u want the liquid Vacuum- when u want the solid and no liquid Exp 2: Enantiomer- nonsuperimposable mirror images. Exp 3: Recrystallizations—purification: find a solvent that will dissolve the solid while hot but same solvent should not dissolve while cold. Cold solvent must keep impurities dissolved in it forever or longer. What kinds of ways recrystallizations: find solvent that are semi soluble in hotand then u cool slowly so its big bc big is pure and hten vacuum filtra
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This note was uploaded on 12/18/2009 for the course CHEM CHEM 220A taught by Professor List during the Fall '09 term at Vanderbilt.

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lab exam notes - Exp 1: Vaporization: turning a liquid to...

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