An organic chemist is planning to extract 1.00 gram of an organic compound disso

Question

An organic chemist is planning to extract 1.00 gram of an organic compound dissolved in 200.0 mL of water into a diethyl ether solvent. The partition coefficient for this system is 9.5 favoring the ether solvent. If the chemist washes the aqueous solution three times with 50.0 mL of diethyl ether. what percent of the original organic compound remains in the aqueous solvent? in which type of chromatograph is the interaction between the analyte and the stationary phase due to the we of the molecule Only? adsorption chromatography partition chromatography gel permeation chromatography Which type of chromatography uses a liquid stationary phase? adsorption chromatography on-exchange chromatography partition chromatography To improve a chromatographic separation, you must increase the number of theoretical plates on the column. increase the height of the theoretical plates on the column increase both the number and the height of the theoretical plates on the column In a given chromatographic column. different solutes behave as if there are a different number of theoretical plates for each the number of theoretical plates is the same for all solutes efficiency is improved by increasing plate height 6 Increasing the flow rate of the mobile phase would increase longitudinal diffusion increase broadening due to mass transfer increase broadening due to multiple paths

Explanation / Answer

1. The amount of compounds remaining after three washes would be,

(b) 2.6%

2. the type of chromatography wherein, the interaction is based on size of the molecule only is,

(c) gel permeation chromatography

3. The type of chromatography using liquid stationary phase is,

(c) partition chromatography

4. To improve a chromatographic separation one must,

(c) increase both the number and the height of the theoretical plates on the column

5. In a given chromatographic column,

(b) the number of theoretical plates is the same for all soluted

6. Increasing the flow rate of mobile phase would,

(a) increase longitudinal diffusion

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