# Beer’s Law Plot and Unknowns

Exercise 2 – Questions 1. Describe possible sources of error in this experiment. 0 Word(s)Questions 2 – 5 are based upon the following scenario: A testing laboratory has been hired by a company called “Drug Company Q” to analyze a series of over-the-counter drugs that the company produces. In all of these over-the-counter drugs, the active ingredient is called “Active Ingredient M.” The laboratory technician collected the data from samples with known concentrations of Active Ingredient M. The data is shown below in Table 2.Table 2. Known Concentrations of Active Ingredient M Drug Sample Identification CodeSample Concentration (M)AbsorbanceQ50004.00 x 10-40.750Q50013.20 x 10-40.602Q50022.40 x 10-40.447Q50031.60 x 10-40.299Q50048.00 x 10-50.150The technician also collected absorbance readings for 5 over-the-counter drugs for review. The data collected for the 5 over-the-counter drugs is shown in Table 3.Table 3. Absorbance Data for Over-the-counter Drugs Sample Identification Code Absorbance M21050-1 0.359 M21050-2 0.356 M21050-3 0.339 M21050-4 0.376 M21050-5 0.522 2. Create a Beer’s law plot and best fit line using the data in Table 2. Upload an image of the graph into Graph 4. 0 Word(s)3. Use the Beer’s law plot and best fit line to determine the concentrations for samples: M21050-1, M21050-2, M21050-3, M21050-4, M21050-5. 0 Word(s)4. The company reported that sample M21050-2 has an M concentration of 0.0003 M. Assuming that the results in Question 3 are 100% accurate and without error, is the company’s statement accurate? What is the percent error between the reported concentration and the concentration calculated in Question 3? 0 Word(s)5. By law, Drug Company Q must have an M concentration between 2.85 x 10-4 M and 3.15 x 10-4 M. Do all samples analyzed meet the legal requirements? Use the information from Question 3 to explain your answer. 0 Word(s)For more information on Beer’s Law Plot and Unknowns read :https://en.wikipedia.org/wiki/Beer%E2%80%93Lambert_law

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