lab 9 discussion

lab 9 discussion - solvent because they have too low of...

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Discussion: During this lab, we used acid-base chemistry to a solid precipitate. Sulfuric acid was used to react with Naproxen, in a proton transfer. Sulfuric acid acted as a proton acceptor and naproxen acted as a proton donator. The resulting product was a liquid solution, with a solid precipitate of naproxen. Naproxen becomes water insoluble after the acid-base reaction The solid product was recrystallized from a mixture of ethanol and water in order to create a solution that made the solid product only soluble at high temperatures. This way we could create a saturated solution at high temperatures and later cool it, to form a pure recrystallization of our solid. The mixing of the two solutions made the ideal solvent for recrystallization of naproxen. We did not use diethyl ether or chloroform as our
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Unformatted text preview: solvent because they have too low of boiling points. During the dissolving step of the recrystallization process, both solvents would have evaporated too quickly. In addition, chloroform can be a dangerous chemical if used improperly. In this lab we did not do part three; therefore our polarimetry studies did not yield any results. In any case, through the use of many techniques we have learned over the semester we were able to collect data about Aleve, and more importantly about its active ingredient naproxen. After purifying our naproxen, we were able to determine its melting range to be 154.9-155.2. We were also able to determine its polarity in relation to other chemicals using a TLC chromatography test. Using test like these is important in the study of chemicals and organic compounds....
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