The spectrophometer was used to measure the absorbance of each of a series of [FeSa]+ solutions. A standard curve was construnceted by plotting the absorbance vs. concentration (M). The slope and y-intercept were found to be 1496 M-1 and .003, respectively.
An aspirin sample was prepared following the procedure given in the experiment. A 0.139 g sample of aspirin was hydrolyzed with 5 mL of 1 M NaOH (reaction 1) and diluted with distilled water to 50 mL in a 50 mL volumetric flask, forming solution A. A 1.00 mL aliquot of solution A was diluted to 50.00 mL using .02 M Fe(III), forming solution B (reaction 2). The absorbance of solution B was found to be .396.
1. Use the measured absorbance and the standard curve's slope and y-intercept to calculate the concentration of [FeSa]+ in solution B
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