Quiz1cor_E - 1 CHM 2123 Quiz#1 Crystallization and...

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1 CHM 2123, Quiz #1: Crystallization and Extraction. Thin Layer Chromatography (TLC) as an Analytical Tool Assigned: September 9, 2009 Due: during the 1 st lab period, at the beginning of the laboratory, to hand in to your TA. MARKING SCHEME 1. Use flowcharts to describe two different methods for separating a mixture of the following compounds. (4 points) CO 2 H N exists in solution as Flow chart 1: Add aqueous HCl and an organic solvent (EtOAc) aqueous phase organic phase Add aqueous NaOH and an organic solvent (EtOAc) organic phase aqueous phase NaCl * * Following separation, the organic phase is dried (Na2SO4 or MgSO4) and the solvent is evaporated. Me Me CO 2 N Me Me H CO 2 H N Me Me N Me Me H Cl * MIXTURE Flow chart 2: Add aqueous HCl and an organic solvent (EtOAc) aqueous phase organic phase Add aqueous NaOH and an organic solvent (EtOAc) organic phase aqueous phase NaCl * CO 2 H N Me Me Na * CO 2 2. Could methanol be used as the organic solvent for the extractions in the previous
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This note was uploaded on 01/13/2010 for the course CHM chm2526 taught by Professor Louise during the Spring '09 term at University of Ottawa.

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Quiz1cor_E - 1 CHM 2123 Quiz#1 Crystallization and...

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