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1. Calculate the Rf values for spots A and B on the TLC plate drawn below....
10. On the TLC plate below, identify the spots in the unknown mixture as compound A,...
10. On the TLC plate below, identify the spots in the unknown mixture as compound A, B. and C and calculate all Rf values. Lanes with X are unknown sample spots. State whether the solvent system used is a great one for the separation of the compounds. С X В X A
10. On the TLC plate below, identify the spots in the unknown mixture as compound A,...
10. On the TLC plate below, identify the spots in the unknown mixture as compound A, B, and C and calculate all Rt values. Lanes with X are unknown sample spots. State whether the solvent system used is a great one for the separation of the compounds. + A B X
Please help 2. Consider the TLC plate shown below that was done on silica gel using...
Please help
2. Consider the TLC plate shown below that was done on silica gel using a solvent mixture of 4:1 hexane/EtoAc as the eluent. 4:1 Hexane:EtOAC marked solvent front Spot B Spot A A origin (a) Which of the two organic compounds labeled A and B is less polar? (b) Calculate the Rf value of compound B. (c) How would the following changes affect the Rf values of A and B? i. Change to a more polar solvent mixture...
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....
1) Calculate the Rf value of a spot that travels 5.7 cm, with a solvent front...
1) Calculate the Rf value of a spot that travels 5.7 cm, with a solvent front that travels 13 cm. 2) 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 unknown material a pure compound? What can be done to verify the purity of the sample using thin-layer chromatography? 3) You try to synthesize n-hexyl bromide as a product...
1. A student spots an unknown sample on a TLC plate and develops it in dichloromehane solbv Only ...
help !!!
1. A student spots an unknown sample on a TLC plate and develops it in dichloromehane solbv Only one spot, for which the Ry value is 0.15, is observed. Does this indicate that the unknown material is a pure compound? What can be done to verify the purity of the sample?
1. A student spots an unknown sample on a TLC plate and develops it in dichloromehane solbv Only one spot, for which the Ry value is 0.15,...
Two compounds might have spots with the same Rf value in a TLC experiment and not...
Two compounds might have spots with the same Rf value in a TLC experiment and not be identical compounds. Which proposed TLC experiment could best help determine whether the compounds are identical? Select one: Repeat the original experiment with a mixture of the compounds in a single spot Repeat the original experiment with larger spots of each compound Repeat the original experiment with a different solvent system Repeat the original experiment with the development chamber jar open
. a. Using the TLC slide drawn below, calculate the Rx values for each spot. See...
. a. Using the TLC slide drawn below, calculate the Rx values for each spot. See page 76 in the lab manual for help. b. State which of the three known substances are present in the unknown by comparing the Unknown Rp values to the Rf values for the Known substances. See page 76 in the lab manual for help. You will need a metric ruler. Solvent front Origin of spot lu 1 2 3 U = Unknown 1,2,3 =...
Which compound should have the highest Rf value on a TLC plate? A acetanilide B nitroacetanilide...
Which compound should have the highest Rf value on a TLC plate? A acetanilide B nitroacetanilide C dinitroacetanilide
1. A mixture containing Compound X and Compound Y is analyzed using silica gel TLC. a....
1. A mixture containing Compound X and Compound Y is analyzed using silica gel TLC. a. If Compound X has an Rf value of 0.7 and Compound Y has an Rvalue of 0.3, which compound is more polar? Explain. b. The solvent traveled 50 mm. How far did Compound Y travel? 2. Why isn't it reasonable for an R. value to be greater than 1? 3. How many spots would you expect to see if you conducted a TLC separation...
10. On the TLC plate below, identify the spots in the unknown mixture as compound A, B. and C and calculate all Rf values. Lanes with X are unknown sample spots. State whether the solvent system used is a great one for the separation of the compounds. С X В X A
10. On the TLC plate below, identify the spots in the unknown mixture as compound A, B, and C and calculate all Rt values. Lanes with X are unknown sample spots. State whether the solvent system used is a great one for the separation of the compounds. + A B X
Please help
2. Consider the TLC plate shown below that was done on silica gel using a solvent mixture of 4:1 hexane/EtoAc as the eluent. 4:1 Hexane:EtOAC marked solvent front Spot B Spot A A origin (a) Which of the two organic compounds labeled A and B is less polar? (b) Calculate the Rf value of compound B. (c) How would the following changes affect the Rf values of A and B? i. Change to a more polar solvent mixture...
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....
1) Calculate the Rf value of a spot that travels 5.7 cm, with a solvent front that travels 13 cm. 2) 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 unknown material a pure compound? What can be done to verify the purity of the sample using thin-layer chromatography? 3) You try to synthesize n-hexyl bromide as a product...
help !!!
1. A student spots an unknown sample on a TLC plate and develops it in dichloromehane solbv Only one spot, for which the Ry value is 0.15, is observed. Does this indicate that the unknown material is a pure compound? What can be done to verify the purity of the sample?
1. A student spots an unknown sample on a TLC plate and develops it in dichloromehane solbv Only one spot, for which the Ry value is 0.15,...
. a. Using the TLC slide drawn below, calculate the Rx values for each spot. See page 76 in the lab manual for help. b. State which of the three known substances are present in the unknown by comparing the Unknown Rp values to the Rf values for the Known substances. See page 76 in the lab manual for help. You will need a metric ruler. Solvent front Origin of spot lu 1 2 3 U = Unknown 1,2,3 =...
1. A mixture containing Compound X and Compound Y is analyzed using silica gel TLC. a. If Compound X has an Rf value of 0.7 and Compound Y has an Rvalue of 0.3, which compound is more polar? Explain. b. The solvent traveled 50 mm. How far did Compound Y travel? 2. Why isn't it reasonable for an R. value to be greater than 1? 3. How many spots would you expect to see if you conducted a TLC separation...
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