The Extraction of Benzoic Acid from a Mixture O chem lab 1

The Extraction of Benzoic Acid from a Mixture O chem lab 1

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The Extraction of Benzoic Acid from a Mixture Jacob Rietschy Chemistry 330 9/13/07
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In this lab benzoic acid was extracted from a mixture. This was done by converting the insoluble benzoic acid into a water soluble form. It was then precipitated by adding strong acid. The benzoic acid was then separated from the solution. Reactions/Mechanisms/Theory: For this lab extraction is used. Extraction is a way to separate a desired compound from a mixture. The type of extraction used in this lab is vacuum filtering. The mass at the beginning and end of the lab will be used to determine K D . K D is determined by taking the concentration of the organic and dividing by the concentration of the aqueous. Extraction Scheme: Cellulose + methyl orange + benzoic acid ether filter cellulose methyl orange + benzoic acid extract NaOH Aqueous Organic benzoic acid + NaOH methyl orange HCl benzoic acid The second extraction in the lab uses the separatory funnel. The different layers of the funnel are shown in the drawing on the next page. The x layer represents the filtrated ether from the step before. The y layer represents the NaOH that is added to the ether. Before it is shaken the two are not separated into layers they are just mixed together. After shaking and venting the
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The Extraction of Benzoic Acid from a Mixture O chem lab 1

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