Question: 7- (a) A student performed a thin layer chromatographic separation experiment. In the first run, four standard substances A - azobenzene, B-benzoin, C-cinnamic acid, and

7- (a) A student performed a thin layer chromatographic separation experiment. In the first run, four standard substances A - azobenzene, B-benzoin, C-cinnamic acid, and D - dextrose were spotted on the plate. The line indicates the solvent front. In the second TLC run a mixture (X) of two of these same substances was separated. Based on Rp values, what is the identity of the unknown mixture X? (b) A second mixture, Y, was run at the same time. What is wrong with the solvent system used to try to separate Y? A B C D X

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