Taylor Collins 2

Taylor Collins 2 - observed, recorded, and compared to each...

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Taylor Collins Lab Report 2: “ Panacetin Compounds Identification” Pre-lab and Observations: Attached Results: Melting Point Data Start Melting (C) Completely Melted (C) mp of recrystallized unknown component: 107 109 mp of unknown mixed with acetanilide: 108 110 mp of unknown mixed with phenacetin: 108 120 Identification of unknown component: acetanilide. Discussion: After successfully excluding the unknown component from the rest of the substances, it was time for the second half of the experiment. After recrystallization my unknown went from .70 grams to .32 grams. I am sure using the purified amount of unknown caused our reults to be more correct. Finding the unknown’s composition by examining its melting point and then comparing it to other substances was most efficient. The unknown was first divided into three equal portions. It was then combined into 1:1 mixtures. One with acetanilide, one with phenacetin, and one of the pure unknown component by itself. The melting points for the three different mixtures were then
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Unformatted text preview: observed, recorded, and compared to each other. The unknown component’s m.p. and the acetanilide mixture’s m.p. were both about 109 degrees Celsius concluding from our results that the unknown component was, in fact, the acetanilide compound. Conclusion: Through recrystallization and comparing of melting points I answered the question: “What is the identity of the unknown component of Panacetin?” I discovered that the unknown in panacetin is acetanilide. In this lab I also learned how to use the melting point reader. Questions: 1. A) It takes about 94 ml of water to dissolve 1.15 grams of phenacetin. B) When the phenacetin and water mixture returns to room temperature I do not know how much will stay dissolved. C) If the phenacetin was pure, after vacuum filtration you should still have 1.15 grams. 2. Compound X is phenyl succinate because the mixture of the unknown with phenyl succinate has the same melting point as phenyl succinate....
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This note was uploaded on 04/19/2010 for the course CH 237 taught by Professor Staff during the Spring '08 term at Alabama.

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Taylor Collins 2 - observed, recorded, and compared to each...

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