Solvent Extraction Lab Report

Solvent Extraction Lab Report - S O L V E N T E X T R A C...

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SOLVENT EXTRACTION TERPSICHORE MARAS-LINDEMAN TA Matthew CHE 231 s. 001 February , 2011 SOLVENT EXTRACTION
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SOLVENT EXTRACTION Purpose A neutral compound, a base and an acid are separated using the process of solvent extraction. The three components of the our mixture once they have been extracted by the process of sol- vent extraction, they will be identiFed upon determining their melting points and comparing them with known melting points from web and literature sources. Theory Usually mixtures of compounds are derivatives of synthetic reaction or natural origins. A task an organic chemist usually frequents is to separate compounds or mixtures by method of extrac- tion. Extraction, is executed by eliminating one or more of the mixture’s compounds by dissolv- ing them individually. Upon, dissolving a selected compound, the attained solution is the ex- tract, which is basically a compound that has been extracted from one solvent and then to an- other one. Though the compound must be able to dissolve, that is, it must be more soluble in the Fnal solvent than the Frst and the actual impurities must be insoluble to the second solvent used. In other words, when we refer to extractions we are always referring to liquid to liquid transfers of a compound, from one aqueous solvent to antoher. There are four fundamental elements that must be satisFed and implemented for a successful solvent extraction(Steven ±. Pedersen 2010). A. Distribution/partition coefFcient for the components to be successfully separated must be opportune B. ±ollowing the solvent extraction, the solvent must be efFciently removed from the solute C. The solvents used must be immiscible, divergent. D. Chemical reactions must not be present. That is , the components of the mixture except in the case of acids and base must not react. University of Kentucky 10668240 1
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Solvent extraction is simply using two solvents that are divergent. Simply, a polar and non- polar solvent were used, like methylene chloride and water and ether and water. It was ob- served that there were two layers in the conical vial, and this separation or layers of observable liquids are due to the densities of the solvents. The most dense solvent will be on the bottom, referred to as the aqueous layer and the less dense solvent on the top, which is referred to as the organic layer. Determining solubility of a compound is juxtapose polar groups to carbon groups, and the rule of thumb is if a compound has a 5:1 ration of carbon to polar groups, then it is insoluble in water since preponderance is given to the alkyl-group it has which in non- polar(Timberlake 2010). It should be noted, that just because like dissolves like doesn’t neces- sarily mean that it will dissolve completely.
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This note was uploaded on 04/11/2011 for the course CHE 231 taught by Professor Patwardham during the Spring '08 term at Kentucky.

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Solvent Extraction Lab Report - S O L V E N T E X T R A C...

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