Experiment 9 Discussion - Experiment 9 Discussion An...

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Experiment 9 Discussion An acid-base reaction occured when sulfuric acid was added to make the solution acidic. Hot water was used to separate the sodium and the naproxen. Naproxen was then negatively charged because the oxygen was negatively charged. Sulfuric acid was used to protenate the naproxen to make it more stable and therefore less reactive. The protenated naproxen was then insoluble in water. The product then precipitated out of the solution. Naproxen was also then soluble in ethanol, which allowed for a co-solvent solution to be used during recrystallization. The reason for using ethanol and water as solvents in recrystallization is that naproxen is slightly soluble in water and ethanol at low temperatures, and more soluble at higher temperatures. Naproxen is soluble in ethanol, and slightly soluble in hot water. The solvent was heated in water to filter out insoluble impurities. Ethanol was added to dissolve the naproxen and to introduce heat into the solution again before allowing it to cool to room temperature. Diethyl ether is not a practical solvent because it is very flammable. Also it can form explosive peroxides
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Experiment 9 Discussion - Experiment 9 Discussion An...

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