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smorehouse smorehouse
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6 years ago
Two students analyzed the same spice by TLC. One of the students used hexane to extract the essential oil while the other student used diethyl ether. Would you expect their developed TLC plates to look the same if they used the same developing solvent? Explain your answer.
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6 years ago
You would expect the plates to look different because the solvents used to extract the compounds were different. Ether would extract out additional polar compounds that hexane would not. The argument that the plates would be different because the polarity of the two extracting solvents would affect how these compounds ran on a TLC plate is incorrect. The extraction solvents would have evaporated off the plate before it was put in the developing chamber.
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