How would the results of the TLC experiment, spotting 2-napthol with the unknown solution (most likey 2-napthol) change if instead of sililica gel a TLC plate had C18 wax (basically a 18-carbon alkane) as the stationary phase?
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How would the results of the TLC experiment, spotting 2-napthol with the unknown solution (most likey 2-napthol) change if instead of sililica gel a TLC plate had C18 wax (basically a 18-carbon
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- What would the gc chromatogram look like when 6.65 g NaBr, 3.78 g NaCl, 7.5 mL of DI water and 5 mL of 1‐butanol are added together then 6 mL of concentrated sulfuric acid added.Both melting points and TLC rely on differences in non covalent forces. Explain the role of these non-covalent interactions in the final answer obtained (melting point and Rf value).Upon screening with TLC (made of silica gel) chromatography using hexane/chloroform (3:1) as eluting solution, 3 spots were detected corresponding to a (A) polyphenol, a (B) tannin and an (C) alkaloid. Write the letters of the on the spots in the chromatogram shown at the right.
- Upon screening with TLC (made of silica gel) chromatography using hexane/chloroform (3:1) as eluting solution, 3 spots were detected corresponding to a (A) polyphenol, a (B) tannin and an (C) alkaloid. Write the letters of your answers on the spots in the chromatogram shown at the right.2. Consider the following example GC Chromatogram from a publication about aggression among Mediterranean Acrobat Ants (C. scutellaris). This particular sample was generated by rinsing hydrocarbons from ant exoskeletons. From the chromatogram, what is the minimum number of unique compunds present in the sample? What data led you to that conclusion? (Don't overthink it) 2 8000000 7000000 6000000 5000000 4000000 3000000 2000000 1000000 Counts (Abundance) 5 19 6 7 0 23.00 24.00 10 | 11 13 17 20 14 15 16 12 teel | 22 19 21 ли 25.00 26.00 27.00 Time "Example of a Gas chromatography-Mass spectrography (GS-MS) chromatogram of hydrocarbon molecules in C. scutellaris" by Filippo Frizzi, et.al, in PLoS One is licensed under CC BY 4.0Using chemical structures, illustrate the differences in weak intermolecular interactions that would occur between both propane and 1-propanol and Carbowax 20M, a polyethylene glycol material. Draw a structure of the polyethylene glycol material to illustrate these interactions. Which of the two compounds do you expect to have longer retention time? Explain.
- A TLC is developed using a mixture of acetone/methanol (both polar solvents) as mobile phase. The solvent front runs 10 cm. Three spots A, B, and C are spotted with the following distances: А: 3.5 сm B: 8 cm C: 5 cm Which spot is the most polar? O A Ов O C O Both B and CCan you help me to support this? Based on your observations of your TLC plate and FeCl3 tests, how pure is your aspirin?Before combining the oil and water phases when making moisturising lotion, the emulsifiers (Glyceryl stereate and Polysorbate 80) must be dissolved in either the oil or the water phase depending on their solubility properties. Decide in which phase each or both the emulsifiers must be dissolved and What type of emulsion (o/w or w/o) will this formulation form? Give a reason for your answer.
- What was the drying agent used after the organic layer was separated? Group of answer choices MgSO4 Na2SO4 CaCl2 Ca(OH)21,8-Cineole is a predominant terpene found in cranberries. The concentration of 1,8-cineole in cranberries was determined using gas chromatography. A 5.00 g sample of freeze-dried cranberry powder was added to 10.0 mL water to form a cranberry extract. The extract was filtered. A 1.00 mL aliquot was added to a 25 ml volumetric along with a known amount of internal standard (d-14 cymene) and diluted to volume with water. Standards were spiked with a fixed amount of d-14 cymene as internal standard. The following data was obtained: 1,8-Cineole (ug/mL); 1,8-Cineole (peak area); d-14 cymene (peak area) 10.0; 1260; 1880 15.0; 1865; 1850 20.0; 2520; 1855 50.0; 6280; 1865 Sample; 1976; 1840 What is the concentration of 1,8-cineole in ug per gram of cranberry? O 398 ug/g O 159 ug/g O 674 ug/g O 796 ug/g O 15.9 ug/gA) What are the basic principles underlying TLC technique? B) Draw a TLC plate and explain how TLC can be used to identify the presence of a specific compound in an organic mixture.