Required Information for Lab Report #3 Due at the start of lab on the week of Oct 15th Results 1) Calculate the theoretical yield of isopentyl acetate based on the amount of material that you used. 2) Calculate the percent yield of the distilled ester product. 3) Report the boiling range for your isopentyl acetate 4) Attach your GC spectrum. Determine the ratio of isopentyl acetate:isopentyl alcohol for your sample using the peak areas. Discussion 1) Restate the problem and your planned approach from your prelab materials. 2) Discuss your isolated yield. In 5a below, you will calculate the maximum yield you'd expect for this reaction. If your yield is lower, discuss likely steps in the reaction where you may have lost some of your product. 3) Discuss your distillation and how your boiling point compared with the reported value for isopentyl acetate. 4) Based on your results, what conclusion can you draw regarding the problem you were addressing in this experiment? Discuss you conclusion in terms of your problem and plan. 5) Answer the following questions a. In your reaction you started with a solution that was approximately 8 M acetic acid and 4 M isopentyl alcohol. Use the equilibrium expression for this reaction to calculate the final concentrations of water, isopentyl acetate, isopentyl alcohol, and acetic acid (you'll need to use the quadratic equation to solve this expression) assuming that the equilibrium constant is 4.2. Calculate the percent yield of isopentyl acetate to which this value would correspond. b. In order to give a better yield, it is common to carry the reaction out under conditions where the water can be removed. Let's say you carried out the reaction using the same initial concentrations of starting materials but removed the water as the reaction proceeded. What would be the final concentration of isopentyl acetate if the final water concentration was 0.25M? What would the percent yield of this reaction be? shanlin pan Microsoft Word - Required Information for Lab Report
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