Lab 4 - Separation of a Three Component Mixture by...

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Separation of a Three Component Mixture by Extraction Experiment #4 Dan Guerra Section: 6 10/11/10 TA: Luke and Yi
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Purpose : The purpose of this experiment was to learn the techniques associated with performing a successful extraction and it’s applications towards organic chemistry. Once the compounds from the mixture were separated through extraction, the effectiveness of the extraction was tested through melting point, TLC, IR and percent recovery. Results and Discussion: After measuring out 1.5g of benzoic acid, 4-chloroanaline, and 1,4- dimethoxybenzene in a 1:1:1 ratio, the first step in the procedure was to extract the components of the 4-chloroanaline (basic). This was accomplished through the addition of HCl, which bound to the 4-chloroanaline and formed a weak salt and water, thereby separating from the mixture. A summarization of the reaction taking place: Once 4-chloroanaline was extracted, it was then put then basified by addition of concentrated NaOH and filtered to get its pure solid form, with a resulting mass of. Next, benzoic acid (acidic) was extracted from the mixture by the addition of NaOH, forming a weak salt and water, leaving only the neutral 1,4-dimethoxybenzene in the extraction chamber. A summarization of the reaction taking place: Once the benzoic acid was extracted, it was acidified by the addition of concentrated HCl and filtered to get its pure solid form. The remaining neutral organic component of the mixture (1,4-dimethoxybenzene) was then purified and concentrated to
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get its pure solid form. Spotting a TLC plate with the three extracted components and the original
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This note was uploaded on 02/15/2012 for the course ORGO 101 taught by Professor Staff during the Fall '11 term at Syracuse.

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Lab 4 - Separation of a Three Component Mixture by...

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