Chem Lab 7 TLC - 1 Thin Layer Chromatography Discussion 1)...

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Thin Layer Chromatography Discussion 1) To narrow down the choice of TLC solvents used in Part II, we chose the solvents from Part I that had the greatest range of R f values. This is because we want the results to be clear when doing the TLC for part II. With a large range of R f values that are dispersed far enough away from each other, the readings of the TLC plate will be easier to read. The solvents we decided to use were ethyl acetate and 10:10:1 toluene:ethyl acetate:acetic acid. 2) To identify the unknown analgesic, we compared the R f value of the unknown in Part II to the calculated R f values of the known analgesics from Part I. 3) My predictions for the R f values of the four compounds in ethyl acetate were that acetaminophen would have the lowest, then aspirin, ibuprofen, and caffeine. The calculated relative R f values were caffeine as the lowest, then acetaminophen, aspirin, and ibuprofen as the highest. The results showed me that the polarity of the compound is more influential in determining how high the R
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Chem Lab 7 TLC - 1 Thin Layer Chromatography Discussion 1)...

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