trying benzophenone using column chromatography. They have prepared a mixture of standard benzophenone and triphenylmethanol and spotted the mixture on three separate TLC plates for elution in three separate solvent systems. The TLC plates are shown below. For each TLC plate, identify which spot is triphenylmethanol and which spot is benzophenone and calculate the Rf value for the spots on each plate. Based on the TLC results, which solvent system do you think the student should use to separate a mixture of benzophenone and triphenylmethanol by column chromatography? Explain your answer.

trying benzophenone using column chromatography. They have prepared a mixture of standard benzophenone and triphenylmethanol and spotted the mixture on three separate TLC plates for elution in three separate solvent systems. The TLC plates are shown below. For each TLC plate, identify which spot is triphenylmethanol and which spot is benzophenone and calculate the Rf value for the spots on each plate. Based on the TLC results, which solvent system do you think the student should use to separate a mixture of benzophenone and triphenylmethanol by column chromatography? Explain your answer.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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Question

3C. A student is trying to determine the best solvent system to use to separate triphenylmethanol from
benzophenone using column chromatography. They have prepared a mixture of standard
benzophenone and triphenylmethanol and spotted the mixture on three separate TLC plates for elution
in three separate solvent systems. The TLC plates are shown below. For each TLC plate, identify which
spot is triphenylmethanol and which spot is benzophenone and calculate the Rf value for the spots on
each plate. Based on the TLC results, which solvent system do you think the student should use to
separate a mixture of benzophenone and triphenylmethanol by column chromatography? Explain your
answer.
100% ethyl acetate
7.6 cm
lower spot 7.2cm
upper spot 7.4cm
7.5cm
50% ethyl acetate
50% hexanes
lower spot 6.1 cm
upper spot 7.4 cm
7.4 cm
100% hexanes
lower spot 2.7 cm
upper spot 3.2 cm

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