lab 9 Questions - can be filtered out of the solution. This...

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Questions: 1. Ethanol is more basic than water. In addition its ethyl group is lipophilic, which can dissolve the coating. The coating is designed to dissolve in the basic environment of the intestines instead of the acidic environment of the stomach. 2. The results from the TLC prove that the product is pure because there is only one spot that traveled on the TLC plate. If the product was not pure, there would be multiple R f values because the impurities would have a different polarity than the product, and therefore travel a different distance. 3. The Excedrin can be dissolved in water, and all the inactive non-soluble
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Unformatted text preview: can be filtered out of the solution. This solution can then be titrated to convert the drugs from acids to their conjugate base. These bases can be extracted into organic solvents one at a time. 4. To recrystallize caffeine, I would choose a mixture of ether and ethanol, because it is not very soluble in ethanol. This solution would allow for some dissolving of caffeine in ether, while the addition of ethanol limits the solubility. 5. Sulfuric acid was used to neutralize naproxen because it is better at pulling the naproxen base away from the sodium atom than other acids, such as acetic acid....
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This note was uploaded on 09/18/2011 for the course CHEM 3AL taught by Professor Li during the Spring '08 term at University of California, Berkeley.

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lab 9 Questions - can be filtered out of the solution. This...

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