Lab5%20Report

Lab5%20Report - 2 . Attach the graph to your report and...

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79 Experiment 5- Molecules and Light GSIs Name___________________________ Report Sheet Your Name___________________________ Partners_____________________________ _____________________________________ Investigation 1: Data and Calculations Table 1. Beer’s Law Data for a Sunscreen Tube mL stock solution mL 95% 2- propanol concentration (g sunscreen /mL solution ) Absorbance 1 2 3 4 5 6 1) Calculate the concentration of sunscreen (g/mL) in one of your diluted solutions that you analyzed in the UV/Vis spectrometer. 2) Construct a Beer’s Law plot (Absorbance vs. concentration) for your sunscreen. Fit the data to a straight line and calculate a value for R
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Unformatted text preview: 2 . Attach the graph to your report and report the equation for the line on the graph. 3) Calculate the extinction coefficient for your sunscreen. Table 2. SPF and extinction coefficient for various sunscreens SPF Extinction Coefficient (mL/gcm) 80 4) What is the correlation between SPF and extinction coefficient? 5) Does the data meet your expectations? Why or why not? Investigation 2: Testing Sunscreens with UV Sensitive Materials Describe the experiment you developed using the UV sensitive disks. Report your data in a logical fashion. Explain the results and draw conclusions....
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Lab5%20Report - 2 . Attach the graph to your report and...

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