Sythesizing Isopentyl Acetate by the Fischer Esterification

1225 WordsOct 1, 20085 Pages
Abstract: The purpose of this experiment was to synthesize isopentyl acetate via an esterification reaction between acetic acid and isopentyl alcohol, using concentrated sulfuric acid as a catalyst. The product was washed with sodium hydrogen carbonate, as well as with water, then dried with anhydrous sodium sulfate. The product was then distilled using a Hickman still and characterized using infrared spectroscopy. The percent yield of isopentyl acetate was 61.52%. This may have been low due to not all of the condensed product being removed from the Hickman still, some product being lost during transfer of the product from the reaction tube into the Hickman still, or the loss of some product due to evaporation during distillation.…show more content…
Place card in spectrometer and run an infrared spectrum on the product. Part 5 – Cleaning Up The aqueous layers from the washings performed in Part 2 may be put down the sink with a lot of water. Place all other materials in their appropriate waste containers. Data and Calculations: Mass isopentyl alcohol: 0.820 g Mass product (isopentyl acetate): 0.745 g Theoretical Yield: 1.211 g Percent Yield: 61.52% Finding Limiting Reagent Acetic Acid (2 mL AA) ( 1.049 g AA) (1 mol AA) (1 mol product) (130.19 g product) (1 mL AA) (60.05 g AA) (1 mol AA) (1 mol product) = 4.549 g isopentyl acetate Isopentyl Alcohol (0.820 g IA) (1 mol IA) (1 mol product) (130.19 g product) (88.15 g IA) (1 mol IA) (1 mol product) = 1.211 g isopentyl acetate The limiting reagent for this esterification reaction is isopentyl alcohol. It yields the least amount of isopentyl acetate in this reaction, and therefore is the limiting reagent. Preparing Isopentyl Acetate by the Fischer Esterification Theoretical Yield Isopentyl Alcohol (0.820 g IA) (1 mol IA) (1 mol product) (130.19 g product) (88.15 g IA) (1 mol IA) (1 mol product) = 1.211 g isopentyl acetate Percent Yield (mass of isopentyl acetate) (0.745 g isopentyl acetate) x (100) = 61.52% yield (theoretical yield) (1.211 g isopentyl acetate) Observed Properties and IR Data and Interpretation: An infrared spectrum of the product revealed
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