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Unformatted text preview: Riti Gupta Chem 3AL Section 112/Piper Klemm Experiment 7 : Thin Layer Chromatography (TLC) Results/Discussion : Each member in the lab group performed a thin layer chromatography (TLC) on four known compounds: aspirin, acetaminophen, caffeine, and ibuprofen. These were done in four different solvent systems, which were 100 % ethyl acetatie, 92:8 ethyl acetate: acetic acid, 60:40 hexane: ethyl acetate, and 10:10:1 toluene: ethyl acetate: acetic acid. The purpose of this part of the lab was to determine which solvent system resulted in the largest separation of the four known compounds, which can be determined by the spots that appeared on the TLC place and the distribution of the R f values calculate. The R f value is defined as the distance from the baseline to the spot divided by the distance from the baseline to the solvent front. The solvent systems used were 100% ethyl acetate, 60:40 hexane: ethyl acetate, and 92:8 ethyl acetate: acetic acid because the TLC plates created using those solvent systems had the best...
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