EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
6th Edition
ISBN: 9781305687875
Author: Gilbert
Publisher: CENGAGE LEARNING - CONSIGNMENT
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Question
Chapter 6.2, Problem 9E
(a)
Interpretation Introduction
Interpretation:
The reason for the streak formation on silica gel TLC plates by carboxylic acids and addition of acetic acid to reduce the streaking should be explained.
Concept Introduction:
Thin Layer Chromatography is a sensitive chromatographic technique which used to analyze small quantities of the samples by solid-liquid adsorption method. Rectangular glass plate is coated with an adsorbent, sample to be analyzed is run on the plate in the developing chamber with the mobile phase to give spots of the analyzed sample.
(b)
Interpretation Introduction
Interpretation:
The chemical component which has to use to reduce the streaking on the TLC caused by the amine should be identified.
Concept Introduction:
Thin Layer Chromatography is a sensitive chromatographic technique which used to analyze small quantities of the samples by solid-liquid adsorption method. Rectangular glass plate is coated with a adsorbent, sample to be analyzed is run on the plate in the developing chamber with the mobile phase to give spots of the analyzed sample.
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Students have asked these similar questions
In silica gel chromatography, which compounds elute first?
A-The least polar
B-Those with ionic functional groups
C-Those with the lowest boiling point
D-Those with the highest molecular weight
E-The most polar
How might the Rf values of colorless substances be determined? That is, how could the colorless spots be located? (for paper chromatography)
a) Thin layer chromatography (TLC) and high performance liquid chromatography (HPLC) can be used as examples to explain difference between adsorption and partition. For each of these chromatographic techniques, identify: + the stationary and mobile phase + how the mobile phase moves b) How is the Rf value for a spot on a TLC plate calculated? What can the Rf value be used for? In order to achieve the best separation of several components of different polarity in a mixture spotted on a TLC plate, what guideline should one follow regarding the choice of a developing solvent? (i.e. polar, non-polar, etc.)
Chapter 6 Solutions
EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
Ch. 6.2 - Prob. 1ECh. 6.2 - Prob. 2ECh. 6.2 - Prob. 3ECh. 6.2 - Prob. 4ECh. 6.2 - Prob. 5ECh. 6.2 - Prob. 6ECh. 6.2 - Prob. 7ECh. 6.2 - Prob. 8ECh. 6.2 - Prob. 9ECh. 6.3 - Prob. 1E
Ch. 6.3 - Prob. 2ECh. 6.3 - Prob. 3ECh. 6.3 - Prob. 4ECh. 6.3 - Prob. 5ECh. 6.3 - Prob. 6ECh. 6.3 - Prob. 7ECh. 6.3 - Prob. 8ECh. 6.3 - Prob. 9ECh. 6.3 - Prob. 10ECh. 6.3 - Prob. 11ECh. 6.3 - Prob. 12ECh. 6.3 - Prob. 13ECh. 6.3 - Prob. 14ECh. 6.3 - Prob. 15ECh. 6.3 - Prob. 16ECh. 6.3 - Prob. 17ECh. 6.3 - Prob. 18ECh. 6.3 - Prob. 19ECh. 6.3 - Prob. 20ECh. 6.4 - Prob. 1ECh. 6.4 - Prob. 2ECh. 6.4 - Prob. 3ECh. 6.4 - Prob. 4ECh. 6.4 - Prob. 5E
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Similar questions
- Thin layer chromatography : When placed on a plate, the silica gel has a polar surface. Explain why. What intermolecular forces can form between the silica and the reference molecules? Name them.arrow_forwardDoe hydrophobic silica gel act as non-polar stationary phase in TLC making the process as reverse chromatography? explainarrow_forwardName types of gels (sieving matrix) that may be used for gel filtration chromatography and discuss the types of samples which may be used for each.arrow_forward
- Use the data below from the titration of two water samples. Calculate the average ppm for the two trials. Volume of Water sample used for each titration 50.31 Concentration of EDTA used for both trails 0.012 Trial 1 Trial 2 Initial Syringe Volume - 8.98 Initial Syringe Volume - 9.46 Final Syringe Volume - 0.97 Final Syringe Volume - 1.53arrow_forwardMetal ions chelate polar groups of analyte molecules for longer retention time. Does this affect chromatogram of RPHPLC?arrow_forwardHow does increasing the polarity of the developing solvent affect the Rf of a compound on a silica gel TLC plate?arrow_forward
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