b You left out the sodium bicarbonate washing step The acids on the solution

B you left out the sodium bicarbonate washing step

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and the carbonyl carbon would be more electrophilic if sulfuric acid is not added. (b) You left out the sodium bicarbonate washing step The acids on the solution are turned to salts by using the sodium bicarbonate. These salts are insoluble in the ester but are soluble in water, so when removing the aqueous layer, the acids in the form of salts will be removed. So no sodium carbonate being added during the washing step, would result in leaving the acids in the solution and solution more impure. (c) Your thermometer bulb was 1 cm higher than it should have been The temperature reading would be to low if the thermometer bulb was too high and this would result in an improper distillation which could result in losing part of the desired distillate. 3. Calculate the amount of isopentyl acetate that should be present in the reaction mixture at equilibrium based on 300 mmol of acetic acid and 150 mmol of isopentyl alcohol as starting quantities. Use equilibrium constant of 4.2 for this calculation. Moles can be used in place of concentration as volumes cancel out. C2H4O2 + C5H12O C7H14O2 + H2O 4.2 = [C7H14O2] [H20] (products) [C2H4O2] [C5H12O] (reactants) water can be ignored 4.2 but the highest attainable yield is 67% so then you must find that which is 2.81 and then proceed. 2.8 = x x = 0.126 mmol C7H1402 [0.300] [0.150]
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  • Fall '13
  • mmol of acetic acid

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