- Data Analysis Data For Standard Solutions First We Must Construct The Beer S Law Plot That You Will Use To Find The Con 1 (44.17 KiB) Viewed 129 times
- Data Analysis Data For Standard Solutions First We Must Construct The Beer S Law Plot That You Will Use To Find The Con 2 (58.77 KiB) Viewed 129 times
Data for Synthesized Aspirin Sample Mass of empty Erlenmeyer flask: Mass of Erlenmeyer flask plus synthesized sample: 79.90g 80.340g 0.44g Mass of synthesized sample: Concentration of synthesized sample after first dilution (to 250 mL): 1600 mg/l Concentration of synthesized sample on dilution with iron solution: mg/L Absorbance of synthesized aspirin sample: 0.968 Examine your Beer's Law plot, and use the absorbance found arlier to estimate the concentration of aspirin in your solution. Mark the point corresponding to your synthesized aspirin sample on the graph with a +. Estimated concentration of aspirin from Beer's Law: mg/L Compare the calculated and measured concentrations of aspirin in your sample. Use these to estimate the purity of your product. Purity of aspirin sample: Data for Commercial Aspirin Sample Absorbance of commercial sample: 0.671 Examine your Beer's Lato plot, and use the absorbance found earlier to estimate the concentration of aspirin in your solution. Mark the point corresponding to your commercial aspirin sample on the graph with an X mg/L Estimated concentration of aspirin from Beer's Law: Recall that you prepared the solution for spectrophotometric analysis by diluting 2.5 mL of solution X in 50 mL of buffer. Use the equation for dilution to calculate the concentration of aspirin in solution X 120.22 mg/l Estimated concentration in solution X: Recall that solution X was prepared by dissolving a single aspirin tablet in 250 mL of solution. Use this infor- mation to determine the mass of aspirin in a tablet. mg Mass of aspirin in a single tablet: 325 mg Mass of aspirin according to manufacturer % error