Question

the diagram above shows thin - layer chromatograms of the same mixture of two compounds. based on the chromatograms, which solvent would be most effective at separating the two compounds if the same stationary phase is used for column chromatography? a. solvent a b. solvent b c. solvent c d. solvent d
methanol, ch3oh, dissolves completely in water to form a solution that does not conduct electricity. which of the following diagrams best shows the major type of attractive force that exists between the particles in the solution? a. diagram a b. diagram b c. diagram c d. diagram d

Explanation:

Step1: Analyze chromatography principle

In chromatography, a good solvent for separation should cause the two compounds to have different rates of movement. Solvent C separates the two - compound spots well on the thin - layer chromatogram, indicating it would be most effective for column chromatography if the stationary phase is the same.

Step2: Analyze intermolecular forces in methanol - water solution

Methanol ($CH_3OH$) and water are polar substances. The major attractive force between the particles in a solution of methanol in water is hydrogen - bonding. In option C, the hydrogen - bonding interaction between the oxygen of methanol and the hydrogen of water and vice - versa is correctly depicted.

Answer:

1. C
2. C