Why is CH2Cl2 the bottom layer in the liquid-liquid extraction? Because it is more dense than the aqueous cola layer. CH2Cl2 is not the bottom layer in the liquid-liquid extraction. Because it is less dense than the aqueous cola layer. Because it is the organic solvent and the organic solvent is usually on the bottom in a separatory funnel.

Why is CH2Cl2 the bottom layer in the liquid-liquid extraction? Because it is more dense than the aqueous cola layer. CH2Cl2 is not the bottom layer in the liquid-liquid extraction. Because it is less dense than the aqueous cola layer. Because it is the organic solvent and the organic solvent is usually on the bottom in a separatory funnel.

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter88: Column Chromatography

Section: Chapter Questions

Problem 5P

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In a liquid – liquid extraction, what is preferable? Three extractions with a small volume or one extraction with a large volume. Explain briefly.
Which of these could not be used in an extraction with water? Explain why you chose these solutions:Acetone, Diethylether, dichloromethane, ethyl aceate, chloroform, ethanol, and hexane
Which statement is valid when the multiple extraction and single extraction is compared. The effciency of multiple extraction and single extraction is incomparable. Single extraction and multiple extraction have the same effciency Multiple extraction is more efficent than single extraction Single extraction is more efficient than multiple extraction
What roles do solvent, density and polarity play in liquid/liquid extraction
If 80% of a desired compound is extracted into the organic phase in each step (leaving 20% in the aqueous layer), how many extractions are necessary to ensure that at least 99% of the compound has been recovered in the organic phase? 1 extraction 2 extractions 3 extractions 4 extractions
PART1: Put True (T) or False (F) for the following sentences: 1. chromatography" derived from two Greek words "Chroma" meaning color and "graphein" meaning to write. The stationary phase may be a solid, or a liquid supported on a solid or gel. 3. The mobile phase may be 2. Solid. 4. Silica gel is the most common stationary phase in adsorption chromatography. 5. Liquid Chromatography abbreviated as (GC ). 6. In Thin Layer Chromatography, the mobile phase is gas. 7. a = KB/KA, where Kg is the distribution constant. 8. k'B and k'A are the retention factors. 9. Rf, is the distance traveled by the compound ONLY. 10. Chromatography is a physical method of separation.
In an extraction procedure, it is advisable to: O put the aqueous layer down the drain put the organic layer in the aqueous waste throw away all layers as soon as you have extracted them save all layers until an experiment is complete
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Because it is more dense than the aqueous cola layer.
	CH₂Cl₂ is *not* the bottom layer in the liquid-liquid extraction.
	Because it is less dense than the aqueous cola layer.
	Because it is the organic solvent and the organic solvent is usually on the bottom in a separatory funnel.