Between benzophenone and 4-nitro benzaldehyde which compound is more polar and which compound would elute first in column chromatography, which compound would be higher on a TLC plate and why?
Between benzophenone and 4-nitro benzaldehyde which compound is more polar and which compound would elute first...
Which is more polar and why? - Ferrocene, acetylferrocene or diacetylferrocene Which compound would elute off a column first and which compound would elute off a column last and why?
4. Will a more polar or more non-polar molecule elute off a column first in reverse phase hy? Explain the rationale by which you made your choice (hint: again, include intermolecular forces in your explanation and include an illustration.).
d) Draw the structure of the most polar compound and draw an arrow (through the structure) representing the overall/net dipole moment of the compound. 3) Suppose that your TLC showed that the compounds had not travelled away from your loading spot. What would be an easy condition to change to make the compounds travel up the TLC plate)? Briefly, state specifically what new condition might you try! (0.5) New conditions you could try is dotting more in the same spot,...
In Thin Layer Chromatography Experiments, would a more polar compound give a smaller or larger Rf value then a less polar compound? Explain your answer by referring to TLC theory (stationary phase, moving phase, polarity). Thanks!
1. What are the main differences between thin layer chromatography (TLC) and column chromatography (CC)? 2. Are CC and TLC operations conducted concurrently? Explain. 3. Name a few packing materials used in packing columns in Column Chromatography operations. 4. Explain the role of eluting solvent(s) in column chromatography procedures. 5. When performing column chromatography, which of the following compounds would you expect to elute first: Ferrocene of acetylferrocene? Explain why.
Which one would elute first on GC (gas Chromatography, hexane or toluene? why?
Pre Lab Questions 1. Complete the following table: Compound Acetanilide (A) Benzophenone (B) Mandelic acid (C) Benzil (D) Benzoic acid (E) Structure Solubility in hexanes Solubility in ethyl acetate 2. Using the following diagram of a TLC plate, answer the following questions: solvent front a) Which compound is more polar if the stationary phase is silica gel? b) True or False: If the solvent mixture was made less polar, the compounds would move farther. c) Use a ruler and calculate...
Pre-Lab Assignment 1 (detach and submit to your TA at the beginning of your lab session) Name: Date: 2009.2019 TA: Given the structures of benzophenone and biphenyl (shown below), answer the following questions. blphenyi benzophenone 1. Which of the two structures is more polar and explain why? 2. Which structure would be expected to have a higher R value on a polar TLC plate (ex: silica, alumina) and why? 3. Why is it recommended to spot the analyte on the...
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...
Post-Laboratory Questions Aspirin adnil tuleno Which compound turned out to be the most polar? The least polar? Do experimental results agree with your theoretical predictions? If not, why? 2. What would a chromatogram look like if a less polar developing solvent were used 3. Consider the following TLC plate of compounds A, B, and C developed in hexanes: solvent front starting line a) Determine the R values of compounds A, B, and C run on a silica gel TLC plate...