Experiment 8 Lab Report: PREPARATION oF ASPIRIN AND OTHER ESTERS Name Date Partn

Question

Experiment 8 Lab Report: PREPARATION oF ASPIRIN AND OTHER ESTERS Name Date Partner Station Section DATA SHEET PART A Prepa tions with units and sig. figs) 1. Write the equation for the formation of aspirin from salicylic acid and acetic anhydride. Show the structures of all reactants and products. o-8-CH3 coo H acid. OH acetic annidride 2. Calculate the mofecular masses for salicylic acid and aspirin. Show calculations. mole Aspirin Table 1. Data from the synthesis of aspirin. Record the mass of salicylic acid used and mass of aspirin obtained. Use the molecular masses to calculate the moles of each: salicylic acid 0.0317 2. 3.00 mL acetic anhydride aspirin o Show Calculation for moles of salicylic acid and aspirin her 0,028 100 glmol mol Record the theoretical yield of aspirin in your reaction here moles (must be same as starting material) moles aspirin (from Record the actual yield of aspirin in your reaction here: Table 1) Calculate the yield of aspirin for your reaction using this equation: Actual yield (moles) X 100 Yield Theoretical yield (moles) 107

Explanation / Answer

% yield = Actual yield (mole) / Theoretical yield (mole) * 100

= Actual moles of aspirin produced / Moles of aspirin produced theoretically *100

= 0.0284/ 0.0181 * 100

= 156.9 %

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