What is the order of in which you would expect the following compounds to be eluted...
What is the order of in which you would expect the following compounds to be eluted from a reverse phase LC column?
- acetone, dichloromethane, acetamide
- acetaminophen, carbamazepine, triclosan
Homework Answers
answers]
a) acetamide
acetonedichloromethane
b) carbamazepine
acetaminophentriclosan
order of elution from reversible phase liquid column is more polar solutes eluting first. increasing polarity of mobile phase leads to longer retention times.
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What is the order of in which you would expect the following
compounds to be eluted...
What is the order in which the following compounds (acetone, 1,2-dichloroethane, acetamide) would be eluted from...
What is the order in which the following compounds (acetone, 1,2-dichloroethane, acetamide) would be eluted from an HPLC column containing a reversed-phase (RP) stationary? dichloroethane < acetone<acetamide acetamide <dichloroethane acetone acetone<acetamide <dichloroethane acetamide <acetone<dichloroethane
(a) In what order do you expect the following species to be eluted in normal-phase LC?...
(a) In what order do you expect the following species to be eluted in normal-phase LC? Indicate with numbers and provide brief rationale: 0₂N NO₂ NO2 trinitrotoluene 1-heptene heptane heptane phenol toluene (b) Fraction of which component of the mobile phase should be increased when a hexane/acetone gradient is employed to facilitate elution of phenol and trinitrotoluene? Provide brief rationale
(a) In what order do you expect the following species to be eluted in normal-phase LC?...
(a) In what order do you expect the following species to be eluted in normal-phase LC? Indicate with numbers and provide brief rationale: 0₂N NO₂ NO2 trinitrotoluene 1-heptene heptane heptane phenol toluene (b) Fraction of which component of the mobile phase should be increased when a hexane/acetone gradient is employed to facilitate elution of phenol and trinitrotoluene? Provide brief rationale
Which of the following compounds would you expect to have the lowest Rf value on a...
Which of the following compounds would you expect to have the lowest Rf value on a silica gel TLC plate developed with dichloromethane? O A. Naphthalene O B. Phenyl acetate OC Butyric acid QUESTION 3 Which of the following compounds would you expect to have the highest Rf value on a silica gel TLC plate developed with dichloromethane? O A 2-octanone O B. Acetic acid C. 1-butanol OD. decane E. acetaldehyde
Put the analytes in order of increasing hydrophobicity. Which of the compounds is most hydrophilic? Which...
Put the analytes in order of increasing hydrophobicity. Which of
the compounds is most hydrophilic? Which is most hydrophobic? What
is the predicted elution order from a reverse phase chromatography
column?
a. acetophenone b. benzophenone c. butylparaben d. propiopheneone e. ethylparaben f. propylparaben g. ketoprofen h. 3-nitrophenol i. 4-nitrophenol 2. Put the analytes in order of increasing hydrophobicity. Which of the compounds is most hydrophilic? Which is most hydrophobic? What is the predicted elution order from a reverse phase chromatography...
Product fraction Submitted (attach to report) Structures of Chromatography Fractions: (Hexane-eluted Product) (Acetone-eluted Product) color clear...
Product fraction Submitted (attach to report) Structures of Chromatography Fractions: (Hexane-eluted Product) (Acetone-eluted Product) color clear Color Yellow Mass Isolated (g) 0.177g Mass Isolated 0.35g m. p. (degree C)114.7c/116.5C (lit. value_) m. p. (degree C) 81.4C-/89.9c (lit. value_ Calculations: Mass of mixture applied to column (g) 0. 48 % Composition of Starting Mixture (show calculation) % (Mass) Recovery (show calculation) _% of Starting Mixture Recovered Questions: What is the maximum possible % recovery, and why would you not expect to...
4. You plan to separate a mixture of the two compounds below using a column chromatography...
4. You plan to separate a mixture of the two compounds below using a column chromatography normal conditions, which of the compounds would you expect to be eluted off the column first? Expla
4) What is the order of elution of the following compounds from a reverse-phase packed HPLC...
4) What is the order of elution of the following compounds from a reverse-phase packed HPLC column? Briefly justify your reasoning. Benzyl alcohol (C6H5CH2OH), benzaldehyde (C6H5CHO), benzoic acid (C6H5COOH), Acetophenone (C6H5C(O)CH3)
4) (10 pts) What is the order of elution of the following compounds from a reverse-phase...
4) (10 pts) What is the order of elution of the following compounds from a reverse-phase packed HPLC column? Briefly justify your reasoning. Benzyl alcohol (C.HSCH-OH), benzaldehyde (C6HSCHO), benzoic acid (C6HCOOH), Acetophenone (C6H5C(O)CH3)
LTC plate A mixture of compounds A, B and C was spotted on a TLC plate...
LTC plate
A mixture of compounds A, B and C was spotted on a TLC plate and the TLC was run in dichloromethane solvent. Which of the following compounds will have the highest R_f value? Explain why? A mixture of compounds A. B and C was separated using column chromatography with dichloromethane as the mobile phase. Which of the following compounds will elute as the last fraction from the column? Explain why?
What is the order in which the following compounds (acetone, 1,2-dichloroethane, acetamide) would be eluted from an HPLC column containing a reversed-phase (RP) stationary? dichloroethane < acetone<acetamide acetamide <dichloroethane acetone acetone<acetamide <dichloroethane acetamide <acetone<dichloroethane
(a) In what order do you expect the following species to be eluted in normal-phase LC? Indicate with numbers and provide brief rationale: 0₂N NO₂ NO2 trinitrotoluene 1-heptene heptane heptane phenol toluene (b) Fraction of which component of the mobile phase should be increased when a hexane/acetone gradient is employed to facilitate elution of phenol and trinitrotoluene? Provide brief rationale
(a) In what order do you expect the following species to be eluted in normal-phase LC? Indicate with numbers and provide brief rationale: 0₂N NO₂ NO2 trinitrotoluene 1-heptene heptane heptane phenol toluene (b) Fraction of which component of the mobile phase should be increased when a hexane/acetone gradient is employed to facilitate elution of phenol and trinitrotoluene? Provide brief rationale
Which of the following compounds would you expect to have the lowest Rf value on a silica gel TLC plate developed with dichloromethane? O A. Naphthalene O B. Phenyl acetate OC Butyric acid QUESTION 3 Which of the following compounds would you expect to have the highest Rf value on a silica gel TLC plate developed with dichloromethane? O A 2-octanone O B. Acetic acid C. 1-butanol OD. decane E. acetaldehyde
Put the analytes in order of increasing hydrophobicity. Which of
the compounds is most hydrophilic? Which is most hydrophobic? What
is the predicted elution order from a reverse phase chromatography
column?
a. acetophenone b. benzophenone c. butylparaben d. propiopheneone e. ethylparaben f. propylparaben g. ketoprofen h. 3-nitrophenol i. 4-nitrophenol 2. Put the analytes in order of increasing hydrophobicity. Which of the compounds is most hydrophilic? Which is most hydrophobic? What is the predicted elution order from a reverse phase chromatography...
Product fraction Submitted (attach to report) Structures of Chromatography Fractions: (Hexane-eluted Product) (Acetone-eluted Product) color clear Color Yellow Mass Isolated (g) 0.177g Mass Isolated 0.35g m. p. (degree C)114.7c/116.5C (lit. value_) m. p. (degree C) 81.4C-/89.9c (lit. value_ Calculations: Mass of mixture applied to column (g) 0. 48 % Composition of Starting Mixture (show calculation) % (Mass) Recovery (show calculation) _% of Starting Mixture Recovered Questions: What is the maximum possible % recovery, and why would you not expect to...
4. You plan to separate a mixture of the two compounds below using a column chromatography normal conditions, which of the compounds would you expect to be eluted off the column first? Expla
4) (10 pts) What is the order of elution of the following compounds from a reverse-phase packed HPLC column? Briefly justify your reasoning. Benzyl alcohol (C.HSCH-OH), benzaldehyde (C6HSCHO), benzoic acid (C6HCOOH), Acetophenone (C6H5C(O)CH3)
LTC plate
A mixture of compounds A, B and C was spotted on a TLC plate and the TLC was run in dichloromethane solvent. Which of the following compounds will have the highest R_f value? Explain why? A mixture of compounds A. B and C was separated using column chromatography with dichloromethane as the mobile phase. Which of the following compounds will elute as the last fraction from the column? Explain why?
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