recrystallization lab

recrystallization lab - CHEM212: Organic Chemistry 1...

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CHEM212: Organic Chemistry 1 RECRYSTALLIZATION Experiment #1
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Introduction: The point of this experiment was to use the laboratory technique of recrystallization to purify an impure sample of phthalic acid. Discussion: This experiment involved the technique of recrystallization, in which an impure sample of crystals was dissolved in a hot solvent, filtered, and recrystallized, with the goal of purifying the sample. Water was used as the solvent in the experiment, and was chosen for its effectiveness at dissolving the phthalic acid at hot temperatures but not at cool temperatures. This technique proved to be quite effective in the purification of the phthalic acid, however some improvements with regards to the procedure could help increase yield. It was found after performing the hot filtration that a moderate number of crystals had formed in the filter paper and had not filtered through the funnel. This significantly decreased the amount of crystals in the final sample and therefore increased
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This note was uploaded on 08/13/2008 for the course CHEM 212 taught by Professor Harpp during the Fall '08 term at McGill.

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recrystallization lab - CHEM212: Organic Chemistry 1...

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