3. There are two major components in the chromatography experiment: the solvent system (mobile phase) and...
3. There are two major components in the chromatography experiment: the solvent system (mobile phase) and the paper (stationary phase). Which of these major components is more polar phase and which is less polar phase? Explain using Lewis structures. (please PLEASE use the lewis structures, thats the part of the question I don't have yet!)
4. What parts of the molecules in the stationary phase will interact with the molecules that are being separated? Please answer this question using the actual structures of the molecules and the actual structure of the stationary phase.
Thank you!!
Homework Answers
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3. There are two major components in the chromatography
experiment: the solvent system (mobile phase) and...
Problem 1 Thin layer Chromatography consist of three parts: The analyte, the stationary phase and mobile...
Problem 1 Thin layer Chromatography consist of three parts: The analyte, the stationary phase and mobile phase. Match each of these terms to what is was in out experiment. Stationary Phase ____ a) The solvent Mobile Phase ____ b) Silica Analyte ____ c) One of the analgesiscs Problem 2 Complete the sentences Analytes on a TLC should have a(n) _________ Rf in a less polar solvent. Analytes on a TLC should have a(n) _________ Rf in a more polar solvent....
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
intermolecular forces experiment question The more polar mobile phase is the 20% acetone solution (since it...
intermolecular forces experiment question The more polar mobile phase is the 20% acetone solution (since it is 80% water). Paper is made from cellulose which contains a lot of oxygen atoms and OH groups. Write a short paragraph discussing which solvent best separated the ink components from the Vis-a-Vis pens. Consider in your discussion the relative attraction of the ink components for the solvent and for the paper. Does your discussion support the statement that these pens are water soluble?
2. An unknown compound was analyzed using thin layer chromatography, its constituted of two components (A...
2. An unknown compound was analyzed using thin layer chromatography, its constituted of two components (A and B) as shown in the TLC (Silica coated stationary phase; Chloroform and Ethyl acetate as mobile phase). The mixture was then loaded onto column with silica as the stationary phase and the same solvent system was used. (2 points) Column Chromatography TLC time A В Predict the order of elution of the compounds (A and B). which one would be eluted first/last and...
PART 1: In a gas chromatography experiment using a non-polar stationary phase A) solutes are eluted...
PART 1: In a gas chromatography experiment using a non-polar stationary phase A) solutes are eluted in order of increasing boiling point. B) solutes are eluted in order of increasing vapor pressure. C) solutes are eluted in order of increasing polarity. PART 2: You can improve the separation of components in gas chromatography by A) raising the temperature of the injection port. B)raising the temperature of the column isothermally. C) raising the temperature of the column programmatically.
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography?...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
Describe the differences between paper chromatography and TLC. Give two advantages and two disadvantages of each...
Describe the differences between paper chromatography and TLC. Give two advantages and two disadvantages of each method for analysis. In order to prepare for a column chromatography separation of 3 ink dye components, you have run a TLC experiment with three possible solvent mixtures. These are the results: Acetone:Hexane in 1:1 ratio gave the following distances: solvent=4.2cm, pigment #1=3.8cm, pigment #2=1.7cm, and pigment #3=1.3cm Acetone:Hexane in 2:1 ratio gave the following distances: solvent=4.3cm, pigment #1=3.8cm, pigment #2=2.1cm, and pigment...
Species 1, 2, 3, and 4 were separated using gas chromatography (species 1 is the solvent)....
Species 1, 2, 3, and 4 were separated using gas chromatography (species 1 is the solvent). Answer the following multiple choice question based on the chromatogram shown below. Which of the following statements are true regarding the chromatogram shown above? At t = 8 min, there is more of species 1 in the stationary phase compared to species 4. Species 4 has the highest partition coefficient. At t = 8 min, there is more of species 4 in the stationary...
Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. 1. What is the purpose of the mobile...
Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. 1. What is the purpose of the mobile phase in chromatography? 2. What is the Ry value for a component in a sample? Lab 3: Chromatography 3. A student developed chromatograms for pure substances A, B, and C, and an containing some of the substances A, B and C. Calculate the values of A, , component of the unknown mixture. Identify the substances present in the unknown pure substances A, B, and...
LOS SCULUI EXPERIMENT # 6 PAPER CHROMATOGRAPHY LABORATORY REPORT DATA AND CALCULATIONS Measure the retention factors...
LOS SCULUI EXPERIMENT # 6 PAPER CHROMATOGRAPHY LABORATORY REPORT DATA AND CALCULATIONS Measure the retention factors (R) for each of the components and report the values in the data table. Student Name Course Section Date Instructor PRE-LAB ASSIGNMENT son Rd? Hetardation factor Re Value) is the distance a given component (analute) divided by the distance the Re values o f mobile phase There is no shry unit for i migration distance of substance Imigrahon 1. What are the units on...
Table 2: Alcohol and Ketone Standards GC Retention Times GC#: Retention time Alcohol Standard Mixture Phent ion= 2.05Smin low Peak 1 Compound Name: athanol Rapesnal utanal aclapeatanal 4.755min oilng 6.895min .230 min Peak 2 Compound Name: Peak 3 Compound Name: Peak 4 Compound Name: GC#:1 Ketone Standard Mixture Retention time 2.575un Peak 1 Compound Name: Acclono Butanon a Pentanone 2tHex anon Peak 2 Compound Name: min Peak 3 Compound Name: 615 min 1D. 307 min Peak 4 Compound Name: Part...
2. An unknown compound was analyzed using thin layer chromatography, its constituted of two components (A and B) as shown in the TLC (Silica coated stationary phase; Chloroform and Ethyl acetate as mobile phase). The mixture was then loaded onto column with silica as the stationary phase and the same solvent system was used. (2 points) Column Chromatography TLC time A В Predict the order of elution of the compounds (A and B). which one would be eluted first/last and...
2. If two different compounds have the same Rr value, how might they be identified using paper chromatography? 3. Why is it important to keep the spots on the paper as small as possible? 4. If the solvent pool at the bottom of the beaker touched the spots on the 1.5cm line, what would happen to the spots? How would you address this error? 5. If you were teaching a student how to do paper chromatography, what three pieces of...
Species 1, 2, 3, and 4 were separated using gas chromatography (species 1 is the solvent). Answer the following multiple choice question based on the chromatogram shown below. Which of the following statements are true regarding the chromatogram shown above? At t = 8 min, there is more of species 1 in the stationary phase compared to species 4. Species 4 has the highest partition coefficient. At t = 8 min, there is more of species 4 in the stationary...
Pre-Laboratory Questions SHOW ALL WORK TO RECEIVE CREDIT. 1. What is the purpose of the mobile phase in chromatography? 2. What is the Ry value for a component in a sample? Lab 3: Chromatography 3. A student developed chromatograms for pure substances A, B, and C, and an containing some of the substances A, B and C. Calculate the values of A, , component of the unknown mixture. Identify the substances present in the unknown pure substances A, B, and...
LOS SCULUI EXPERIMENT # 6 PAPER CHROMATOGRAPHY LABORATORY REPORT DATA AND CALCULATIONS Measure the retention factors (R) for each of the components and report the values in the data table. Student Name Course Section Date Instructor PRE-LAB ASSIGNMENT son Rd? Hetardation factor Re Value) is the distance a given component (analute) divided by the distance the Re values o f mobile phase There is no shry unit for i migration distance of substance Imigrahon 1. What are the units on...
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