Name Experiment 7 – PREPARATION OF ASPIRIN AND OTHER ESTERS Date Partner Station # – Pre-Lab Preparation Section Questions 1-3 refer to these structures: CH,CH-O-CH,CH, CH,CH,CH,CH.CH.CH-OH CH,-0-0-CH,CH.CH, O anch-o- & -on,ch, and on and ansch.com 1. a) List the letters for the structures that are esters. b) Circle the ester functional group in any esters. 2. a) Write the letters for the two compounds that could be used to make an ester by an esterification reaction. b) Write the reaction equation for this esterification reaction, showing the structures of all reactants and products. 3. Give the letters and the IUPAC names for the esters you identified in question 1. 4. Assume that an esterification reaction is done using 0.10 moles of a carboxylic acid and 1.0 moles of an alcohol. What is the theoretical yield (in moles) for the reaction? (You can write a generic esterification reaction to help answer this question and recognize the limiting reagent.) (check the reverse side)

5. A student completes the reaction described in question 4 and obtains 5.3 g of the product (the product has a molecular mass of 74.0 g/mol). a) What is the actual yield (the moles of product obtained)? Show your calculation, including units. 5.3 g product X mol products b) Calculate the % yield for the reaction. Show your calculation, including units.