A TLC plate was run in 1:1 ethyl acetate and hexane, but when developed the plate...
-Spot a new plate and run again in the same solvent system
-Spot a new plate and run in neat hexane
-Spot a new plate and run in 1:2 ethyl acetate/hexane
-Spot a new plate and run in 2:1 ethyl acetate/hexane
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A TLC plate was run in 1:1 ethyl acetate and hexane, but when developed the plate...
Common solvents used in TLC analysis are hexane and ethyl acetate, the latter being more polar. A TLC has been performed...
Common solvents used in TLC analysis are hexane and ethyl acetate, the latter being more polar. A TLC has been performed on a mixture of two compounds. The solvent ran for 3 cm(plate length is 6cm) with 5% ethyl acetate in hexane. The two spots were not resolved, meaning they showed up too close to each other. What can you suggest to possible improve the results of the separation?
If acetaminophen is used in a TLC experiment with 100 % ethyl acetate as the solvent...
If acetaminophen is used in a TLC experiment with 100 % ethyl acetate as the solvent system, explain in terms of polarity why the spot would move fast or slow up the TLC plate?
If aspirin (acetylsalicylic acid) is used in a TLC experiment with 1:1 Hexanes / Ethyl acetate...
If aspirin (acetylsalicylic acid) is used in a TLC experiment with 1:1 Hexanes / Ethyl acetate as the solvent system, explain in terms of polarity why the spot would move fast or slow up the TLC plate?
can you please answer all 1. When you run a TLC of the reaction in ethyl...
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) 9 10 8 7 LLLLLLL 6 5 4 001 2 3 b. Calculate the R for the bottom spot. (5 points) c. Which compound on the TLC plate is the most...
can you please answer all 1. When you run a TLC of the reaction in ethyl...
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. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted...
2. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted below. Each spot on the plate corresponds to one of the compounds given on the right. Match each spot with a compound. ТСН, H.CO nambumetone ОН a) A=nambutone B= tolmetin C =phenacetin b) A=nambutone B=phenacetin C = tolmetin c) A=phenacetin B= tolmetin C = nambutone A= tolmetin B=phenacetin C = nambutone e) A=phenacetin B=nambutone C = tolmetin tolmetin phenacetin
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
Possible Quiz Questions 1 What two methods of visualizing spots on a TLC plate will you...
Possible Quiz Questions 1 What two methods of visualizing spots on a TLC plate will you use in this Give two reasons why would you predict that the elution solvents (hexanes or acetate) would not be visible under UV visualization? week's lab? ethyl 2. Define R 3. Calculate the R of the spot on the following TLC plate. 4. Which compound in each pair is predicted to have the higher Ri? a. CH3CH2CH2CH2OH and CH3CH2CH2CH28r b. CH3CH2CH2CH2OH and CH3CH2CH2CH2CH2CH2CH3 c....
3. TLC analysis of an unknown sample using pure ethyl acetate as a developing solvent gives a single spot with an Rf va...
3. TLC analysis of an unknown sample using pure ethyl acetate as a developing solvent gives a single spot with an Rf value of 0.08 1 points A. Explain why this result does not guarantee that the sample is a pure compound. B. Suggest two changes that could be made to the experiment to improve the analysis of the unknown sample. 2 points Change 1 Change 2
Question 10 1 pts What hazard classification would you expect a 90% ethyl acetate/10% hexane mixture...
Question 10 1 pts What hazard classification would you expect a 90% ethyl acetate/10% hexane mixture to have? Flammable liquid Corrosive Toxic Flammable solid Question 16 1 pts The TLC diagram shown represents the analysis of three different compounds. Which of the three columns is/are likely to represent a pure compound, and why? 0 0 2 * 3 Columns 1 and 3, because there is only one spot in each. Column 2 only, because there are two spots present Columns...
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) 9 10 8 7 LLLLLLL 6 5 4 001 2 3 b. Calculate the R for the bottom spot. (5 points) c. Which compound on the TLC plate is the most...
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. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted below. Each spot on the plate corresponds to one of the compounds given on the right. Match each spot with a compound. ТСН, H.CO nambumetone ОН a) A=nambutone B= tolmetin C =phenacetin b) A=nambutone B=phenacetin C = tolmetin c) A=phenacetin B= tolmetin C = nambutone A= tolmetin B=phenacetin C = nambutone e) A=phenacetin B=nambutone C = tolmetin tolmetin phenacetin
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
Possible Quiz Questions 1 What two methods of visualizing spots on a TLC plate will you use in this Give two reasons why would you predict that the elution solvents (hexanes or acetate) would not be visible under UV visualization? week's lab? ethyl 2. Define R 3. Calculate the R of the spot on the following TLC plate. 4. Which compound in each pair is predicted to have the higher Ri? a. CH3CH2CH2CH2OH and CH3CH2CH2CH28r b. CH3CH2CH2CH2OH and CH3CH2CH2CH2CH2CH2CH3 c....
3. TLC analysis of an unknown sample using pure ethyl acetate as a developing solvent gives a single spot with an Rf value of 0.08 1 points A. Explain why this result does not guarantee that the sample is a pure compound. B. Suggest two changes that could be made to the experiment to improve the analysis of the unknown sample. 2 points Change 1 Change 2
Question 10 1 pts What hazard classification would you expect a 90% ethyl acetate/10% hexane mixture to have? Flammable liquid Corrosive Toxic Flammable solid Question 16 1 pts The TLC diagram shown represents the analysis of three different compounds. Which of the three columns is/are likely to represent a pure compound, and why? 0 0 2 * 3 Columns 1 and 3, because there is only one spot in each. Column 2 only, because there are two spots present Columns...
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