Consider the following scenario: You have a mixture of phenol and anisol, your TLC is coated...
Consider the following scenario: You have a mixture of phenol and anisol, your TLC is coated with silica gel, and you will use ethyl acetate as your mobile phase. Which compound will travel a longer distance in the TLC plate? Explain your answer.
Homework Answers
silica gel (stationary phase) which is very polar on the plate. Therefore the less polar compound will travel a longer distance in the TLC plate.
In between given compounds, phenol is mor polar than anisole. So, anisole travels a longer distance in the TLC plate than that of phenol.
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Consider the following scenario: You have a mixture of phenol
and anisol, your TLC is coated...
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A student monitored the reaction progress of the reduction of 4-Nitrobenzaldehyde to 4-Nitrobenzyl alcohol using TLC....
A student monitored the reaction progress of the reduction of
4-Nitrobenzaldehyde to 4-Nitrobenzyl alcohol using TLC. 30% ethyl
acetate in petroleum ether was used as the elution solvent. TLC
plates available in the laboratory were coated with the common
absorbent silica gel (SiO2.xH2O) which
contains polar hydroxyl (OH-) groups.
c. The crude product moves slower
than the starting material with the mobile
phase in the TLC plate. Briefly
explain a possible reason for the
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structures...
2. What are the phases involved in TLC? 3. What is coated on the TLC plate?...
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Chm 250 please help ASAP Thank you and it's in exam Below is a TLC plate...
Chm 250 please help ASAP
Thank you and it's in exam
Below is a TLC plate in which silica gel is the stationary phase. (1) What does "TLC" stand for? (2) For samples 1 through 5 which one contains the compound of largest polarity? Explain your answer. (3) Based on the TLC result, what are the components of mixture M?
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can
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2. An unknown compound was analyzed using thin layer chromatography, its constituted of two components (A...
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d. The following TLC plate was run with a mobile phase that consisted of 5% Ethyl...
d. The following TLC plate was run with a mobile phase that consisted of 5% Ethyl Acetate:95% Hexanes. Explain the result and describe what change to the mobile phase you would make to correct the issue. Solvent Fruct Speed Compound Line of One
Why would it be unwise to use 100% ethyl acetate as the first mobile phase you...
Why would it be unwise to use 100% ethyl acetate as the first mobile phase you test when determining the best mobile phase to separate the mixture of analgesics in Procedure? Why do polar compounds move slower up the silica TLC plates than nonpolar compounds? Why does increasing the polarity of the mobile phase increase the rate at which all compounds move up the plate?
TLC Consider the following silica gel TLC plate of compounds A, B, and developed in hexanes:...
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4. Consider the following silica gel TLC plac or compounds A, B, and hexines: developed in Fo-o- og a) Determine the Rr values of compounds A, B, and C run on a silica gel TLC plate using hexanes as the solvent b) Which compound, A, B, or C. is the most polar? values if you used acetone instead c) What would you expect to happen to the of hexanes as the eluting solvent? 5) Consider a sample that is a...
A student monitored the reaction progress of the reduction of
4-Nitrobenzaldehyde to 4-Nitrobenzyl alcohol using TLC. 30% ethyl
acetate in petroleum ether was used as the elution solvent. TLC
plates available in the laboratory were coated with the common
absorbent silica gel (SiO2.xH2O) which
contains polar hydroxyl (OH-) groups.
c. The crude product moves slower
than the starting material with the mobile
phase in the TLC plate. Briefly
explain a possible reason for the
observation based on the chemical
structures...
2. What are the phases involved in TLC? 3. What is coated on the TLC plate? 4. What is the purpose of lining the wall of the TLC chamber with paper? 5. Why is it important to use a small amount of the mobile phase? 6. Why should you remove the TLC plate before the mobile phase reaches the top? 7. What type of compounds are visible with UV light? 8. With a polar stationary phase and non-polar mobile phase,...
Chm 250 please help ASAP
Thank you and it's in exam
Below is a TLC plate in which silica gel is the stationary phase. (1) What does "TLC" stand for? (2) For samples 1 through 5 which one contains the compound of largest polarity? Explain your answer. (3) Based on the TLC result, what are the components of mixture M?
can
you please answer all
1. When you run a TLC of the reaction in ethyl acetate : hexanes 1:1, the plate below is produced. Give a solvent system that would be expected to produce greater separation and a BRIEF (8 words) justification about your choice. (5 points) 7 6 5 4 3 b. Calculate the R for the bottom spot. (5 points) c. Which compound on the TLC plate is the most polar? (5 points) 2. Why is it...
2. An unknown compound was analyzed using thin layer chromatography, its constituted of two components (A and B) as shown in the TLC (Silica coated stationary phase; Chloroform and Ethyl acetate as mobile phase). The mixture was then loaded onto column with silica as the stationary phase and the same solvent system was used. (2 points) Column Chromatography TLC time A В Predict the order of elution of the compounds (A and B). which one would be eluted first/last and...
d. The following TLC plate was run with a mobile phase that consisted of 5% Ethyl Acetate:95% Hexanes. Explain the result and describe what change to the mobile phase you would make to correct the issue. Solvent Fruct Speed Compound Line of One
Why would it be unwise to use 100% ethyl acetate as the first mobile phase you test when determining the best mobile phase to separate the mixture of analgesics in Procedure? Why do polar compounds move slower up the silica TLC plates than nonpolar compounds? Why does increasing the polarity of the mobile phase increase the rate at which all compounds move up the plate?
TLC Consider the following silica gel TLC plate of compounds A, B, and developed in hexanes: solvent front 0 D origin A B C 22. Determine the Ry values of compounds A, B, and Crun on a silica gel TLC plate using hexanes as the solvent. 23. Which compound, A, B, or C, is the most polar? 24. What would you expect to happen to the Ry values if you used acetone instead of hexanes as the eluting solvent? 25.TLC...
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