The spectrophotometer was used to measure the abosrbance of each of a series of [FeSal]+ solutions. A standard curve was constructed by plotting the absorbance vs. concentration (M). The slope and y-intercept were found to be 1517 M-1 and 0.001, respectively.
Procedure
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 50.00 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 0.02 M Fe(III), forming solution B (reaction 2). The absorbance of solution B was found to be 0.379.
How many moles of [FeSal]+ were in the 50.00 mL of solution B?
2 answers