Chem151_Lab_08 - GenChem Week 8 Midterm Exam Today's...

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GenChem Week 8 Midterm Exam Today’s Agenda: ± Collect pre-lab assignment. ± Conduct written test of course material. ± Review background material on sunscreens. ± Discuss the problem to be addressed. ± Collect data. ± Analyze results. ± Write and submit a report.
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GenChem WRITTEN TEST There is not enough room to answer the questions on the test paper. Please answer on separate sheets making sure you identify where each problem is answered. For numerical answers, put a box around the answer. You have one hour.
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GenChem The Problem: You are to describe the relationship between a sunscreen’s SPF rating and the amount of UV light absorbed.
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GenChem SUNSCREENS How do they work? What is the SPF rating?
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GenChem How can we determine the absorbing power of the sunscreens?
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GenChem Why can’t we just put some of the sunscreen in a cuvet and measure its absorbance?
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GenChem Separation In the process of extracting the absorbing molecules from the sunscreen, what issues need to be considered? Since you need to
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Chem151_Lab_08 - GenChem Week 8 Midterm Exam Today's...

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