how would the results change if a 15 cm plate was used to run each trial instead of a 7.5 cm plate for TLC
how would the results change if a 15 cm plate was used to run each trial...
6) Plate A, below, represents the TLC chromatogram of a compound run in hexanes. The same compound was then spotted on a large TLC plate and again run in hexanes Which TLC plate, B, C, or D, correctly represents how far the compound would run on the longer plate? solvent front solvent - front plate A plate B plate plate D
4. TLC Data: Provide a drawing of your TLC plate with proper labels, and specify which solvent system was used to develop the TLC. Comment on the purity of your product according to TLC. Explain why the newly produced phenacetin would run higher on the TLC plate compared to the starting material acetaminophen.
3. If the TLC plate development had stopped before the solvent front reached the top of the TLC plate (i.e. maybe it reached the middle of the TLC plate when it was stopped, instead): a) Would the Rf values have been affected? If so, how? If not, why not? Give a numerical example to support your answer. b) Would the size of the spots have been affected? If so, how? If not, why not? (Hint: think about the diffusion of...
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
QUESTION 4 Based on the image of a TLC plate below, how far (in cm) did the solvent travel relative to where the compounds were spotted? Please do ndt nclude units. 5 cm 7 cm 3 cm 2 cm
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...
CHEM 2010 LAB TLC 4 PRELAB WORK 1. How would you change your technique for application or solvent system if each of these issues was observed: a.Large spot that trails up plate b.Barely visible spot C. Spot barely moves even with solvent near top of plate d. Both compounds of mixture travel with solvent front to top with little to no separation.
Two concave lenses, each with ƒ = −15 cm, are separated by 7.5 cm. An object is placed 25 cm in front of one of the lenses. Find (a) the location and (b) the magnification of the final image produced by this lens combination. How would I solve this using ray tracing?
Explain how you used TLC analysis to identify each product obtained from the dihydroxylation reactions. Explain why 100% ethyl acetate was used to develop your TLC plate (and not 100% hexane or a mixture of hexane/ethyl acetate)?
Why would you NOT run a TLC plate to determine purity for the following reaction? Please disregard the blue circle H H xylenes H₂O OH ОН heat heat H H 3-sulfolene (butadiene sulfone) maleic anhydride 4-cyclohexene-1,2- dicarboxylic anhydride CgH803 152.05 g/mol 4-cyclohexene-1,2- dicarboxylic acid CgH1004 170.16 g/mol CAHOS 118.15 g/mol C4H2O3 98.06 g/mol