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Question 9 1 pts Considering the silica gel TLC plate shown, which compound is the most...
A silica gel TLC plate was spotted using compounds A-D and developed in hexane. Spot “B”...
A silica gel TLC plate was spotted using compounds A-D and developed in hexane. Spot “B” traveled a distance of 2.0 cm from the solvent front at 4.0 cm, which of the following is a correct way to calculate its Rf value? Spot Distance traveled (cm) A 0.50 B 2.0 C 3.0 D 1.0 Spot B Rfis 4.0 cm/0.20 cm = 2.0 Spot B Rf is 4.0 cm/(4*2.0 cm) = 0.50 Spot B Rfis 2.0 cm/4.0 cm = 0.50 Spot...
One student ran a TLC of an unknown compound on a silica gel plate and the...
One student ran a TLC of an unknown compound on a silica gel plate and the distance from the starting line to the solvent front was 4 centimeters. the compound being analyzed had Rf of 0.25. Another student was analyzing another unknown compound by TLC on an identical plate but the distance from the starting line to the solvent front was 5 cm and the distance from the starting line to the compound was 1.25 cm. Are the students compounds...
TLC Consider the following silica gel TLC plate of compounds A, B, and developed in hexanes:...
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...
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...
4. Consider the following silica gel TLC plac or compounds A, B, and hexines: developed in...
4. Consider the following silica gel TLC plac or compounds A, B, and hexines: developed in Fo-o- og a) Determine the Rr values of compounds A, B, and C run on a silica gel TLC plate using hexanes as the solvent b) Which compound, A, B, or C. is the most polar? values if you used acetone instead c) What would you expect to happen to the of hexanes as the eluting solvent? 5) Consider a sample that is a...
Thin Layer Chromatography (TLC) is a common technique that is routinely used in chemistry labs. It...
Thin Layer Chromatography (TLC) is a common technique that is routinely used in chemistry labs. It is simple, inexpensive, and very useful. Select the TRUE statement. More polar compounds travel faster on a TLC plate than less polar compounds. If compound A has a smaller Rf value than compound B, we can conclude that compound A is more polar than B. The stationary phase of a TLC silica gel plate is nonpolar. Rr is calculated as the distance traveled...
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...
1. What is the retention factor for the following TLC plate if the baseline is 1...
1. What is the retention factor for the following TLC plate if the baseline is 1 cm, elute solvent traveled 5cm, and the spot of interest traveled 2.5cm? a) 0.50 b) 1.6 c) 0.63 d) 1.4 10. Column chromatography employs both a stationary and a mobile phase. Which of the compounds listed below is commonly used as the stationary phase in column chromatography? a) decolonizing charcoal b) sodium bicarbonate c) benzoic acid d) silica gel
6. Silica gel was used as the solid support for the TLC plate. Which of the...
6. Silica gel was used as the solid support for the TLC plate.
Which of the three compounds (A, B, or C) in the APPLIED MIXTURE is
the least polar? (See the figure attached.)
8. Which compound below will have the highest Rf on a TLC
plate? Explain your reasoning. (See figure attached.)
10. The following TLC plates have been spotted with two
different compounds and are about to be eluted. For each plate,
explain if it has been spotted...
2. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted...
2. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted below. Each spot on the plate corresponds to one of the compounds given on the right. Match each spot with a compound. ТСН, H.CO nambumetone ОН a) A=nambutone B= tolmetin C =phenacetin b) A=nambutone B=phenacetin C = tolmetin c) A=phenacetin B= tolmetin C = nambutone A= tolmetin B=phenacetin C = nambutone e) A=phenacetin B=nambutone C = tolmetin tolmetin phenacetin
A silica gel TLC plate was spotted using compounds A-D and developed in hexane. Spot “B” traveled a distance of 2.0 cm from the solvent front at 4.0 cm, which of the following is a correct way to calculate its Rf value? Spot Distance traveled (cm) A 0.50 B 2.0 C 3.0 D 1.0 Spot B Rfis 4.0 cm/0.20 cm = 2.0 Spot B Rf is 4.0 cm/(4*2.0 cm) = 0.50 Spot B Rfis 2.0 cm/4.0 cm = 0.50 Spot...
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...
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...
4. Consider the following silica gel TLC plac or compounds A, B, and hexines: developed in Fo-o- og a) Determine the Rr values of compounds A, B, and C run on a silica gel TLC plate using hexanes as the solvent b) Which compound, A, B, or C. is the most polar? values if you used acetone instead c) What would you expect to happen to the of hexanes as the eluting solvent? 5) Consider a sample that is 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...
6. Silica gel was used as the solid support for the TLC plate.
Which of the three compounds (A, B, or C) in the APPLIED MIXTURE is
the least polar? (See the figure attached.)
8. Which compound below will have the highest Rf on a TLC
plate? Explain your reasoning. (See figure attached.)
10. The following TLC plates have been spotted with two
different compounds and are about to be eluted. For each plate,
explain if it has been spotted...
2. A silica gel TLC plate developed with 5% acetic acid in ethyl acetate is depicted below. Each spot on the plate corresponds to one of the compounds given on the right. Match each spot with a compound. ТСН, H.CO nambumetone ОН a) A=nambutone B= tolmetin C =phenacetin b) A=nambutone B=phenacetin C = tolmetin c) A=phenacetin B= tolmetin C = nambutone A= tolmetin B=phenacetin C = nambutone e) A=phenacetin B=nambutone C = tolmetin tolmetin phenacetin
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