Lab 2 - Spectrophotometric Determination of Aspirin Taylor...

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Spectrophotometric Determination of AspirinTaylor Warinner-CalixtoHeather AllenChem 112L 0082/2/16
Research Questions:1.What is the amount of pure aspirin in the aspirin tablets made by Bayer and Kroger?
Calculations:Y=4965.8x+0.4174Bayer:0.748=4965.8x+0.4174X= 0.000665754 g/mL0.0000665754 g/mL x 100mL = 0.00665754 g of aspirin0.00665754 g x 50 = .33287688 total grams of aspirin in each tablet(.33287688/.396)x100=84.06%Kroger:0.752=4965.8x+0.4147X=0.0000673809g/mL0.0000673809g/mL x 100 mL = 0.00673809 g of aspirin0.00673809 x 50 = .336904425 total grams of aspirin in each tablet(.336904424/.367)x100 = 91.8%Claims:We can claim that as the concentration of aspirin in a solution goes up the absorbance of thatsolution will go up as well. After testing the absorbance of both Kroger and Bayer and doing calculationswe were able to claim that Kroger had a higher percentage of pure aspirin.Evidence:The ultimate goal of this lab was to determine the amount of pure aspirin in the store brandaspirin tablet. To this we first needed to create a standard curve line. In order to do this we created 6different solutions. Each solution had a different about of pure aspirin in them. We then took thesedifferent solutions and tested them in the Spectrometer. The spectrometer determined the absorbanceof each solution. We then put this into excel and got an equation to determine concentration. To testeach store brand tablet we first recorded the total mass to use later when finding out the percentage of

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Term
Fall
Professor
HeatherRankin
Tags
Chemistry, pH, pure aspirin

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