Homework Answers
With increasing the polarity of the compound, the boiling point increases and hence retention time also increases.
that is more polar compound have higher retention time.
Least polar compound have lowest retention time.
1) compound (B) have highest boiling point.
2) Increasing order of their polarity:
A < C < B
3) component (C) is the minor component as its peak area is lowest.
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Qs1. Answer the following questions based on the gas chromatogram of a mixture of three components...
1. A mixture of four alkenes (1-decene, 1-heptene, 1-nonene, and 1-octene) was analyzed by gas chromatography....
1. A mixture of four alkenes (1-decene, 1-heptene, 1-nonene, and 1-octene) was analyzed by gas chromatography. Below, on the line, list the four alkenes in order of increasing retention time: 2. At 760.0 mm atmospheric pressure, a binary liquid mixture of components A and B gives the temperature composition diagram shown below. The liquid curve plots boiling point vs. composition of the liquid mixture. The vapor curve plots temperature vs. equilibrium vapor composition. A horizontal line on the diagram, such...
asap please thanks 9. Refer to the gas chromatograph (below) of a mixture of Compound A...
asap please
thanks
9. Refer to the gas chromatograph (below) of a mixture of Compound A (RT 1.11) and Compound B (RT-2.27), which was done on a general purpose column: START 51 1.10 227 RT AREA X000X TYPE ABHT AREAS 0.009 0.61 1.11 2.27 XX XX0X XX 55874 44.117 XXXX XX XX TOTAL AREAXX MUL FAC TOR-X Which compound has the highest retention time? b. Which compound is present in a larger amount assuming that their mass correction factors are...
You have obtained a gas chromatogram of a two component mixture of compounds A and B....
You have obtained a gas chromatogram of a two component mixture of compounds A and B. The height of peak A is 3.42 cm. and the width at half height is 1.98 cm. The height of peak B is 3.58 cm. and the width at half height is 1.66 cm. The percentage of a component in the mixture is proportional to peak area. Estimate peak areas by multiplying height by width at half height. What was the percentage of compound...
help needed with this problem set Refer to the HPLC chromatograms below for a 5-component mixture of organic acids for the following questions. The specific HPLC parameters for chromatogram A (...
help needed with this problem set
Refer to the HPLC chromatograms below for a 5-component mixture of organic acids for the following questions. The specific HPLC parameters for chromatogram A (top) are described in the figure title and the insert. You only need the lecture notes and/or your personal experience to answer those questions. Mobile phase: 30 % MeCN, 70 % TFA, 0.1 M (pH 2.0) low rate: 1.0 mL/min 2Benzok Acid Maleic Aci 1. (a) Which component has the...
4. The compounds in a mixture separated by GC can be identified by their retention times....
4. The compounds in a mixture separated by GC can be identified by their retention times. If you Suructor nad not told you which peak in the GC chromatogram corresponded to which alker you didn't know the boiling points of the alkenes, how could you determine the identity or each peak by its retention time? Identities of the components in a mixture separated by GC can also be determined by the technique called "spiking". Suppose you had run a chromatogram...
am i correct on these questions? if not please let me know how i can improve...
am i correct on these questions? if not please let me know how
i can improve them. thanks!
c. (6 pts) A certain sample was run through a GC. and the chromatogram given below was produced What information can you determine about the sample that produced this gas chromatogram you say about the component(s) in the sample? Be sure to include as much relevant information as you can for full credit. lover Be or SA Different Info Difference in Retention...
looking for a check of my work, is this correct? if not please let me know....
looking for a check of my work, is this correct? if not please
let me know. thanks!
1. (23 Total Points) Gas Chromatography a. (5 pts) Circle the BEST answer for the question below. Of the compounds listed below, which would you expect to eluto last from a nonpolar gas chromatographic column? 3 • n-Propanol (CH3CH2CH2OH) Polar Polar = 7* (mPoland 1. Methanol (CH3OH) Polar NON-Polar = 2nd 4. n-Butanol (CH3CH2CH2CH2OH) ВР 1st Low C . n-Pentanol (CH3CH2CH2CH2CH2OH) and Higher...
3) Use the chromatogram to answer the following questions. 7.54 655 bar R = 6.44 280...
3) Use the chromatogram to answer the following questions. 7.54 655 bar R = 6.44 280 bar Rs = 5.04 165 bar a) Which column has more theoretical plates? b) Which column has a smaller plate height? c) What is the retention time of the compound with the highest partition coefficient? d) Given the flow rate is constant for columns A-C, explain why the most pressure is needed to obtain a constant flow rate for column A?
8. Answer the questions based on the chromatogram shown below. Solvent Front 5.8 cm Blue Spot...
8. Answer the questions based on the chromatogram shown below. Solvent Front 5.8 cm Blue Spot 5.1 cm Green Spot 48 cm a) Which color has the strongest attraction to the stationary phase? Explain. b) Which color has the strongest attraction to the mobile phase? Explain. c) What is the retention factor (Rt) for the yellow spot? Show your work. d) What is the retention factor (Rt) for the red spot? Show your work. Yellow Spot 15 cm Red Spot...
Need help with 5 Please The following questions 1-6 relate to the chromatogram shown below, obtained...
Need help with 5 Please
The following questions 1-6 relate to the chromatogram shown below, obtained in an experiment to separate 3 components in a mixture using a column of internal diameter 320.0 um (including the stationary phase thickness) and 30.0 m in length. The stationary phase thickness is 3.0 um on each side of the inside wall of the column, as shown in the figure. 320 um Detector Signal (UA) 0.6 1.2 1.8 Time (min) Unretained A 0.57 2.29...
1. A mixture of four alkenes (1-decene, 1-heptene, 1-nonene, and 1-octene) was analyzed by gas chromatography. Below, on the line, list the four alkenes in order of increasing retention time: 2. At 760.0 mm atmospheric pressure, a binary liquid mixture of components A and B gives the temperature composition diagram shown below. The liquid curve plots boiling point vs. composition of the liquid mixture. The vapor curve plots temperature vs. equilibrium vapor composition. A horizontal line on the diagram, such...
asap please
thanks
9. Refer to the gas chromatograph (below) of a mixture of Compound A (RT 1.11) and Compound B (RT-2.27), which was done on a general purpose column: START 51 1.10 227 RT AREA X000X TYPE ABHT AREAS 0.009 0.61 1.11 2.27 XX XX0X XX 55874 44.117 XXXX XX XX TOTAL AREAXX MUL FAC TOR-X Which compound has the highest retention time? b. Which compound is present in a larger amount assuming that their mass correction factors are...
help needed with this problem set
Refer to the HPLC chromatograms below for a 5-component mixture of organic acids for the following questions. The specific HPLC parameters for chromatogram A (top) are described in the figure title and the insert. You only need the lecture notes and/or your personal experience to answer those questions. Mobile phase: 30 % MeCN, 70 % TFA, 0.1 M (pH 2.0) low rate: 1.0 mL/min 2Benzok Acid Maleic Aci 1. (a) Which component has the...
4. The compounds in a mixture separated by GC can be identified by their retention times. If you Suructor nad not told you which peak in the GC chromatogram corresponded to which alker you didn't know the boiling points of the alkenes, how could you determine the identity or each peak by its retention time? Identities of the components in a mixture separated by GC can also be determined by the technique called "spiking". Suppose you had run a chromatogram...
am i correct on these questions? if not please let me know how
i can improve them. thanks!
c. (6 pts) A certain sample was run through a GC. and the chromatogram given below was produced What information can you determine about the sample that produced this gas chromatogram you say about the component(s) in the sample? Be sure to include as much relevant information as you can for full credit. lover Be or SA Different Info Difference in Retention...
looking for a check of my work, is this correct? if not please
let me know. thanks!
1. (23 Total Points) Gas Chromatography a. (5 pts) Circle the BEST answer for the question below. Of the compounds listed below, which would you expect to eluto last from a nonpolar gas chromatographic column? 3 • n-Propanol (CH3CH2CH2OH) Polar Polar = 7* (mPoland 1. Methanol (CH3OH) Polar NON-Polar = 2nd 4. n-Butanol (CH3CH2CH2CH2OH) ВР 1st Low C . n-Pentanol (CH3CH2CH2CH2CH2OH) and Higher...
3) Use the chromatogram to answer the following questions. 7.54 655 bar R = 6.44 280 bar Rs = 5.04 165 bar a) Which column has more theoretical plates? b) Which column has a smaller plate height? c) What is the retention time of the compound with the highest partition coefficient? d) Given the flow rate is constant for columns A-C, explain why the most pressure is needed to obtain a constant flow rate for column A?
8. Answer the questions based on the chromatogram shown below. Solvent Front 5.8 cm Blue Spot 5.1 cm Green Spot 48 cm a) Which color has the strongest attraction to the stationary phase? Explain. b) Which color has the strongest attraction to the mobile phase? Explain. c) What is the retention factor (Rt) for the yellow spot? Show your work. d) What is the retention factor (Rt) for the red spot? Show your work. Yellow Spot 15 cm Red Spot...
Need help with 5 Please
The following questions 1-6 relate to the chromatogram shown below, obtained in an experiment to separate 3 components in a mixture using a column of internal diameter 320.0 um (including the stationary phase thickness) and 30.0 m in length. The stationary phase thickness is 3.0 um on each side of the inside wall of the column, as shown in the figure. 320 um Detector Signal (UA) 0.6 1.2 1.8 Time (min) Unretained A 0.57 2.29...
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