Andrade_Experiment1

Andrade_Experiment1 - Chem Francisco Andrade 262L...

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Chem 262L Francisco Andrade Separation of Components from a Mixture Purpose: The purpose of this experiment is to use solvent-solvent extraction to separate organic components from a mixture. Balanced Chemical Equation: R OH OH- O + R O O - + H 2 O R O O - + H 2 SO 4 R OH O + HSO4 - The acid component in the organic solution is converted by a base into a water-soluble salt in the first reaction, so it can dissolve in the aqueous phase and separate from the impurities. In the second reaction, the acid is regenerated by treating the solution with sulfuric acid. Procedure: From 0.5 to 1.0 g of the unknown material was measured and recorded, as well as the number of the unknown. The solid was transferred into an Erlenmeyer flask, and 15 mL ether and 15 mL 5% NaOH were added and swirled. The solution was poured into a separatory funnel and swirled and vented for two minutes. The two layers were allowed to separate and the aqueous layer was drained out into a clean Erlenmeyer flask. The ether layer was extracted again with 10 mL 5% NaOH for two minutes, and the resulting aqueous layer was added to the flask with the first aqueous layer. The ether layer was removed and set aside to evaporate. The aqueous extracts were combined and rinsed into the separatory funnel with 10 mL ether and 5 mL water, and swirled and vented for two minutes. The aqueous layer was removed and transferred to a clean Erlenmeyer flask, and was allowed to cool in an ice-water bath for five minutes. Ten milliliters of H
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Andrade_Experiment1 - Chem Francisco Andrade 262L...

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