Concept explainers
(a)
Interpretation:
Concept Introduction :
Column chromatography is a large scale solid-liquid adsorption chromatographic technique that can separate multi-gram amounts of mixtures. This is a preparative version of thin layer chromatography that permits separation and isolation of products by a collection of eluted fractions.
(b)
Interpretation:
More polar compounds from fluorine and 9-fluorenone should be identified and explained.
Concept Introduction :
Column chromatography is a large scale solid-liquid adsorption chromatographic technique that can separate multi-gram amounts of mixtures. This is a preparative version of thin layer chromatography that permits separation and isolation of products by a collection of eluted fractions.
(c)
Interpretation:
From fluorine and 9-fluorenone, first eluting compound that expects from a normal − phase column chromatography should be identified and the reason should be explained
Concept Introduction :
Column chromatography is a large scale solid-liquid adsorption chromatographic technique that can separate multi-gram amounts of mixtures. This is a preparative version of thin layer chromatography that permits separation and isolation of products by the collection of eluted fractions.
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EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
- 6. If more polar impurities are desired to be eluted first and then analyte, then at which stage do you need a strong organic solvent, such as methanol, when preparing samples with solid phase extraction A. Conditioning and loading b. Loading and eluting c. Washing and eluting d. Conditioning and washing e. Conditioning and eluting 7. If more polar impurities are desired to be eluted first and then analyte, then at which stage do you need a medium strength solvent, for example a mixture of methanol- water or methanol-buffer, when preparing samples with solid phase extraction A. Washing and loading b. eluting c. Conditioning d. Washing and eluting e. washingarrow_forward1. Which of the following can most likely increase the yield of recrystallized benzoic acid? a. A fluted filter paper was used during cold filtration. b. The receiving flask from hot filtration does not contain a small amount of solvent. c. Activated charcoal was not added to the solution. d. The solution was filtered immediately after hot filtration.arrow_forwardImagine that the blue component of a given mixture moved 2.5 cm from the oigin or starting line, and the solvent had traveled 10.0cm, What is the Rf for the blue dye A .4.4 B 0.25 C. 7.5 D. 25arrow_forward
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- 8. If a mixture of the four compounds shown below are placed on the top of a silica gel column and eluted properly, what is the expected order of elution? Оон A CO₂H B CIarrow_forwardWill the melting point increase or decrease with the benzoic acid, 4-chloroanaline, and naphthalene if : -You do not remove all of the HCl from the first extraction (mixture) -You forget to do the NaOH extraction (aq layer) -You do not rotovap all of the solvent in the final step (organic layer)arrow_forwardIn which of the following cases would recrystallization be favored over extraction when purifying a mixture of two solid compounds? I. When a significant difference in pKa exists between the two compounds. II. When both compounds have the same functional group(s). III. When the desired compound is poorly soluble in the solvent pair at low temperatures and greatly soluble in the solvent pair at high temperatures. A. I and III B. II C. II and III D. I and II E. I, II, and III F. None of the abovearrow_forward
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- Macroscale and Microscale Organic ExperimentsChemistryISBN:9781305577190Author:Kenneth L. Williamson, Katherine M. MastersPublisher:Brooks ColeEBK A SMALL SCALE APPROACH TO ORGANIC LChemistryISBN:9781305446021Author:LampmanPublisher:CENGAGE LEARNING - CONSIGNMENT