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?
Homework Answers
As we know that when the two spots are two close in Rf we have to always elute the TLC in lower percentage so that the two spits can be rdsolve properly. As in above case we are using 5% ethyl acetate in hexane if we will make it 2.5% ethyl acetate in hexane we can get the better resolution. So lower the percentage of ethyl acetate in hexane is the best possible suggestion to get the better TLC.
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Common solvents used in TLC analysis are hexane and ethyl acetate, the latter being more polar. A TLC has been performed...
A TLC plate was run in 1:1 ethyl acetate and hexane, but when developed the plate...
A TLC plate was run in 1:1 ethyl acetate and hexane, but when developed the plate only showed baseline spots. What change could be made to get the spot(s) to move further up 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
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....
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...
if applicacable, please write clear stepwise mechanism for all synthetic transformations, showing important internediates where appropriate....
if applicacable, please write clear stepwise mechanism for all
synthetic transformations, showing important internediates where
appropriate. only do this if applicable for this lab.
Experiment SD Column Chromatography Running the Reaction. Once sodium borohydride has been added to the reaction meture Isee next paragraph take samples at the times just indicated. Because this must be done in such a short time you must be well prepared before starting the reaction. One person should be the timekeeper, and the other person...
What are the instruments that have been utilized for the review article discussions? ` 1. Introduction...
What are the instruments that have been utilized for the
review article discussions?
`
1. Introduction In recent years, nanoclays have been the object of particular interest for many scientists and researchers in chemistry, physics, engineering and biology due to their excellent properties as well as their sustain- ability [1-3]. For instance, they represent the starting point to the de velopment of smart materials for drug delivery (4-9), food packaging [10-12), environmental remediation and wastewater treatment [13], cultural heritage [14–17and...
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....
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...
if applicacable, please write clear stepwise mechanism for all
synthetic transformations, showing important internediates where
appropriate. only do this if applicable for this lab.
Experiment SD Column Chromatography Running the Reaction. Once sodium borohydride has been added to the reaction meture Isee next paragraph take samples at the times just indicated. Because this must be done in such a short time you must be well prepared before starting the reaction. One person should be the timekeeper, and the other person...
What are the instruments that have been utilized for the
review article discussions?
`
1. Introduction In recent years, nanoclays have been the object of particular interest for many scientists and researchers in chemistry, physics, engineering and biology due to their excellent properties as well as their sustain- ability [1-3]. For instance, they represent the starting point to the de velopment of smart materials for drug delivery (4-9), food packaging [10-12), environmental remediation and wastewater treatment [13], cultural heritage [14–17and...
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