One method for determining the purity of aspirin (empirical formula, C9H8O4) is to hydrolyze it with NaOH solution and then to titrate the remaining NaOH. The reaction of aspirin with NaOH is as follows: Salicylate ion Acetate ion A sample of aspirin with a mass of 1.427 g was boiled in 50.00 mL of 0.500 M NaOH. After the solution was cooled, it took 31.92 mL of 0.289 M HCl to titrate the excess NaOH. Calculate the purity of the aspirin. What indicator should be used for this titration? Why?
Zimielle Daniel CHEM 1152/L Dr. Hornbuckle 2 September 2016 Molecular Models I. Building Molecular 3-Dimensional Models from 2-Dimensional Drawings There will be several sets of molecular models found in the laboratory. Try to construct each of the following molecules using these models. Once constructed, show the instructor for approval and then dismantle the model and replace the pieces for others to use. Name these structures (if you have not learned the rules for the functional group, simple list they type of functional group rather than the name). CH A. CH 3 B. 3 CH C
