13BPrelab - -Continue heating for at least 60 minutes-When...

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Pre-lab Notes: Experiment 13B (Synthesis of Banana Oil) - Assemble a reflux apparatus on top of a hot plate using a 25 mL round-bottom flask and a water-cooled condenser - Place a drying tube packed with calcium chloride on top of the condenser - Weigh an empty 10-mL graduated cylinder, then add 2.5 mL isopentyl alcohol and reweigh it to determine the weight of alcohol used - Disconnect the round-bottom flask and put the alcohol in it - Measure 3.5 mL of glacial acetic acid and add it to the alcohol in the flask - Add 0.5 mL concentrated sulfuric acid, mix immediately, add a boiling stone and reconnect the flask - Start circulating water in the condenser and let the mixture boil
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Unformatted text preview: -Continue heating for at least 60 minutes-When time is up disconnect and allow it to cool- Transfer the reaction mixture to a 15 mL centrifuge tube- Add 5 mL of water, cap the tube and shake carefully- Let the layers separate and remove the lower aqueous later- Extract the organic layer with 2.5 mL of aqueous sodium bicarbonate- Extract again with 2.5 mL of saturated aqueous sodium chloride-Transfer the crude ester to a 25 mL Erlenmeyer flask and add 0.5g anhyrdrous sodium sulfate-Cork and allow it to stand for 10 minutes- Assemble a distillation apparatus- Record the boiling point range of the ester- Weigh the product and calculate percent yield...
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This note was uploaded on 04/03/2008 for the course CHEM 129A taught by Professor Dunno during the Spring '08 term at CSU Fresno.

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