If a TLC was run in a solvent system that caused all the spots to show up at the baseline, how could the system be adjusted so that Rf values could be determined?
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Q: As1...If a TLC plate shows only one spot with an Rf value of 0.98, does this mean the sample is…
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A: co-spot in TLC
If a TLC was run in a solvent system that caused all the spots to show up at the baseline, how could the system be adjusted so that Rf values could be determined?
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- As1...If a TLC plate shows only one spot with an Rf value of 0.98, does this mean the sample is pure? Briefly explain why or why not.A student spots an unknown sample on a TLC plate and develops it in dichloromethane solvent. Only one spot, for which the Rf value is 0.95, is observed. Does this indicate that the unknown material is a pure compound? What can be done to verify the purity of the sample?A fresh TLC plate is spotted with compound A,B and C, but with methylene chloride as a solvent. How does the change in solvent system affect the Rf value of compound A?
- True or False: Rf values can be used to identify pure compounds, provided that the analysis of the unknown is run simultaneously with the known compound in the same TLC plate.Calculate the Rf value for a spot in a TLC experiment if the solvent moved 14.9 cm and the spot moved 9.5 cm from the origin.Calculate the RF value for a spot in a TLC experiment if the solvent move 13.5 cm and the spot move 9.1 cm from the origin
- A student spots an unknown sample on a TLC plate and develops it in pentane solvent. Only one spot, for which the Rf value is 0.05, is observed. Is the un-known material a pure compound? What can be done to verify the purity of the sample?Calculate the rf values from the TLCHow does increasing the polarity of the developing solvent affect the Rf of a compound on a silica gel TLC plate?