extraction_notes

extraction_notes - Partition Coefficient Dr. Gergens - SD...

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Partition Coefficient Dr. Gergens - SD Mesa College Liquid-liquid extraction involves the distribution of a solute between two immiscible layers of solvent. In general, one of the solvents will be water and the other a far less polar organic solvent like diethyl ether, dichloromethane, petroleum ether. 0.7 1.3 0.7 1.0 density very flammable very flammable bp 40-60°C bp 40°C bp 35°C bp 100°C diethyl ether dichloromethane petroleum ether > > H 2 O > capable of dissolving salts: RCOONa RNH 3 Cl incapable of dissolving salts Polarity By taking advantage of the differing solute/solvent solubility as well as solvent/solvent insolubility, compounds can be selectively separated. In this experiment, a given organic compound will be partitioned between an organic solvent and water by liquid-liquid extraction. The partition coefficient, K D , for a solute between the two immiscible phases is a numerical quotient for the distribution or solubility, C, of the solute in each solvent. The distribution value or solubility, C, for the solute in each
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extraction_notes - Partition Coefficient Dr. Gergens - SD...

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