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rsdsdfs - Separation of Solids by Extraction I Purpose and...

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Separation of Solids by Extraction I. Purpose and Introduction The purpose of this lab was to use an extraction technique to separate a mixture of a carboxylic acid and a non-acidic, or neutral, into pure components. After the two mixtures are separated, you use a recrystalization method to purify the substances even further. Melting points can then be aquired to indicate the identity of the substances. II. Procedure 1. Obtain 1 g of a 50/50 mixture of an unknown acid and a neutral compound. Add this mixture to 15 mL of ether in a 125 mL Erlenmeyer flask. Add 10 mL of 5% aqueous sodium bicarbonate and dissolve the solid in the two phase mixture. Move the mixture to a separatory funnel. 2. Shake the separatory funnel to extract and then drain the water layer into a 125 mL Erlenmeyer flask. 3. Extract the ether layer one more time with 10 mL of sodium bicarbonate solution, combining the sodium bicarbonate extracts. 4. Drain the ether layer into a 50 mL Erlenmeyer flask. Add about 0.5 teaspoons of
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