SC CHEM 333 - Acid Catalyzed Esterification Post-Lab (3 pages)

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Acid Catalyzed Esterification Post-Lab



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Organic Chemistry 333L section 03M Laboratory Post Lab Acid Catalyzed Esterification By Cameron Kahn 5 November 2013 TA James Collie Observations The unknown alcohol had a slightly alcoholic odor When the acids acetic and sulfuric were added to the unknown alcohol in the round bottom flask the solution heated up substantially meaning that the reaction was exothermic The solution began to bubble a few minutes later and continued to boil through the hour and a half reflux period The vapors traveled up the column and condensed back into liquid further up Droplets of the liquid were seen sliding back down into the solution After some time during this process the solution turned a slight yellow hue The solution was then transferred to the separatory funnel where water and ether were added Two layers formed but there was barely any noticeable line between the two layers The undesired bottom layers were always removed throughout the process When the sodium bicarbonate was added two distinct layers formed This also occurred when the sodium chloride was added In both steps the stopper could be felt trying to come off the separatory funnel due to the build up of pressure The pressure was caused by the formation of carbon dioxide from the sodium bicarbonate reacting with the acids in the solution Constant venting was needed to decrease the pressure build up from inside the funnel The final product that was recovered after a final distillation had a fruity odor to it Using microboiling point techniques a steady stream of bubbles could be seen coming from the end of the capillary tube and when removed from heat the liquid rose entirely up the capillary tube This process was noted to be capillary action This 1 Page was a similar action that was seen in the TLC experiment where the solution traveled up the adsorbent layer on the TLC paper through capillary action Results Amount of product weight of product and test tube weight of test tube 0 091g 3 788g 3 697g Boiling point



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