Expt 1 - A Colorimetric Determination of Aspirin - SP 2015 copy - DATA SHEET PART A Mass of acetylsalicylic acid g Molar Mass of acetylsalicylic

Expt 1 - A Colorimetric Determination of Aspirin - SP 2015 copy

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6 DATA SHEET PART A Mass of acetylsalicylic acid ____________ g Molar Mass of acetylsalicylic acid ___180.16___ g mole ± 1 Volume of solution prepared __2000.00___ mL Using the above data calculate the concentration of tetraaquasalicylato ion in Solution S in the space below. tetraaquasalicylato ion [ [Fe(H 2 O) 4 SA] + ] ____________ M Volume of Solution S Concentration Absorbance( mean ) Solution 1 ___2.00 mL___ ____________ ____________ Solution 2 ___3.00 mL___ ____________ ____________ Solution 3 ___4.00 mL___ ____________ ____________ Solution 4 ___5.00 mL___ ____________ ____________ Solution 5 ___6.00 mL___ ____________ ____________ In the space below show calculation for concentration of Solution 1: Use Excel and the information in the table above create a scatter plot of absorbance ( y -axis) vs. concentration ( x -axis). From your graph determine the equation of the best fit line and the R 2 value. This information should be displayed on your graph. To complete this task use the feature Format trendline . PART B Brand of Aspirin tablet ____________ Mass of acetylsalicylic acid per tablet (from label on bottle) ____________ Absorbance (ave.) of solution ____________ Concentration of acetylsalicylic acid solution in 50.00 mL sample ____________ Concentration of acetylsalicylic acid in the 2.00-mL aliquot
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