Chem 3AL, Summer 2023 Name:__________________________ Dr. Pete Marsden
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H. Expt 9 Naproxen – Data-Analysis Packet
1. In the experiment, there are two consecutive centrifugations with the same solution.
What is the purpose of going through that second extraction/centrifugation step?
2. Why was it important to test the pH of the solution to make sure it was still acidic?
3. This experiment used a mixed solvent recrystallization system. Which solvent is the
desired compound MORE soluble in? Why? How does adding the other solvent
assist in the recrystallization process?
4. Calculate the percent recovery of naproxen using your theoretical yield calculated in
your prelab (notebook setup prompt 3) for a single pill of Aleve.
