04 - Extraction

04 - Extraction - Organic Chemistry I Pre-lab Lecture CHEM...

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Separation of Acids and Neutral Compounds by Solvent Extraction CHEM 3221 Organic Chemistry I Pre-lab Lecture UH DEPARTMENT OF CHEMISTRY
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CHEM 3221 Organic Chemistry I Pre-lab Lecture UH DEPARTMENT OF CHEMISTRY Extraction Solvent Extraction A method of isolating or separating components of a mixture based on their relative solubilities. During the process the soluble component(s) of a mixture transfers to the liquid phase until equilibrium is reached. A type of extraction that involves partitioning a mixture in two different immiscible liquids, usually an organic solvent and water. The transfer of mass between the layers are are dictated by the solubility of the components in the mixture. A type of extraction where an insoluble solid is repeatedly washed with a solvent to remove impurities or isolate a particular component from the insoluble material. Much like making coffee or doing laundry 1. LIQUID-LIQUID EXTRACTION 2. SOLID-LIQUID EXTRACTION Types of Extraction
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CHEM 3221 Organic Chemistry I Pre-lab Lecture UH DEPARTMENT OF CHEMISTRY Partition CoefFcient, K P “The ratio of concentrations of a particular compound in the two phases of a mixture composed of two immiscible liquids at equilibrium .” ORGANIC LAYER AQUEOUS LAYER LAYER INTERFACE If you have a 2 immiscible solvents containing an organic solute, at equilibrium: K P (org/aq) = concentration of X in the organic layer concentration of X in the aqueous layer For an organic compound X: A K P of 10 means that at equilibrium, there is 10X more compound X in the organic layer compared to the aqueous layer SOLUTE PARTICLES The preference of a solute to transfer in a particular layer is dictated by its solubility
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04 - Extraction - Organic Chemistry I Pre-lab Lecture CHEM...

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