Paper Chromatography: Why does spotting the known and the unknown on the same paper help identify...
Paper Chromatography: Why does spotting the known and the unknown on the same paper help identify the unknown amino acid? Why does spotting both the known and the unknown in the same place on the paper help to identify the unknown amino acid?
Homework Answers
Paper chromatography helps to identify unknown compounds. If you spot the known and unknown amino acids in the same paper and you add mobile phase , both compounds will travel to certain distance. If both have travelled same distance from the spot, then you can say that known and unknown are same amino acids.
Similarly, if you spot both unknown and known amino acids on the same place and add mobile phase, both known and unknown compounds travel same distance and form single spot this indicates known and unknown are same.
If known and unknown are different, then it gives two different spots after adding the mobile phase.
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Paper Chromatography: Why does spotting the
known and the unknown on the same paper help identify...
(Paper Chromatography of Amino Acids) Amino Acid Rr Value Spot Color Glycine Leucine Proline Tyrosine Unknown...
(Paper Chromatography of Amino Acids) Amino Acid Rr Value Spot Color Glycine Leucine Proline Tyrosine Unknown Sample The unknown sample is: Solvent Glycine Tyrosine Proline Leucine Unknown Tyrosine Proline Leucine Glycine Unknown Start Two 0 E 2 L
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...
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4. For the green food color, how would it be possible to show that the component spots you separated do produce a green food color? 5. Why did you chromatograph a mixture containing all four of the amino acids? 6. Why is it important in the amino acid chromatogram not to touch the paper with your fingers or hands? Does this matter in the food color experiment?
Answer the following two questions A paper chromatography experiment was conducted on a mixture of amino...
Answer the following two questions A paper chromatography experiment was conducted on a mixture of amino acids including Aspartic acid (Asp), Glutamic acid (Glu), Histidine (His), Leucine (Leu), Phenylalanine (Phe) and Proline (Pro). The following Rf values were determined: Asp (0.245), Glutamic (0.275), His (0.295), Leu (0.745), Phe (0.685) and Pro (0.445). In the experiment, a colored spot for unknown amino acid "W" was found centered at a distance 25 mm from the start line when the solvent line had...
Scientific Calculator Answer the following two questions: 1. A paper chromatography experiment was conducted on a...
Scientific Calculator Answer the following two questions: 1. A paper chromatography experiment was conducted on a mixture of amino acids including Aspartic acid (Asp), Glutamic acid (Glu), Histidine (His), Leucine (Leu), Phenylalanine (Phe) and Proline (Pro). The following Rf values were determined: Asp (0.245), Glutamic (0.275), His (0.295), Leu (0.745), Phe (0.685) and Pro (0.445). In the experiment, a colored spot for unknown amino acid "W" was found centered at a distance 25 mm from the start line when the...
In a chromatography experiment, how do you identify the components of an unknown mixture? Select one:...
In a chromatography experiment, how do you identify the components of an unknown mixture? Select one: Combine the mixture with multiple known compounds and look for the largest spots. Compare the Rf values of the mixture components to the Rf values of pure known compounds. Combine the mixture with a series of known compounds and observe the color of the dots. Compare the color of the mixture spots to the colors of pure known compounds.
"R" group polarity nonpolar, polar, or polar with H- bonds. 1. choose any two know amino acids with similar Rf and based...
"R" group polarity nonpolar, polar, or polar with H-
bonds.
1. choose any two know amino acids with similar Rf and based on the
size and polarity of their side chains, give an explanation for why
their retention factors are similar.
2. choose any two known amino acids with very different Rf values
and based on the size and polarity of their side chains, give an
explanation for why their retention factors are dissimilar.
3. Explain why lysines Rf is...
In complete sentences on the back of this page or on a separate piece of paper...
In complete sentences on the back of this page or on a separate piece of paper answer the following questions. (5 pts each) 1. Choose any two known amino acids with similar R and based on the size and polarity of their side chains, give an explanation for why their retention factors are similar. 2. Choose any two known amino acids with very different Rr values and based on the size and polarity of their side chains, give an explanation...
D. CHROMATOGRAPHY Chromatography is a general technique that is used to separate various materials. In this case,...
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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...
(Paper Chromatography of Amino Acids) Amino Acid Rr Value Spot Color Glycine Leucine Proline Tyrosine Unknown Sample The unknown sample is: Solvent Glycine Tyrosine Proline Leucine Unknown Tyrosine Proline Leucine Glycine Unknown Start Two 0 E 2 L
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...
paper chromatography
4. For the green food color, how would it be possible to show that the component spots you separated do produce a green food color? 5. Why did you chromatograph a mixture containing all four of the amino acids? 6. Why is it important in the amino acid chromatogram not to touch the paper with your fingers or hands? Does this matter in the food color experiment?
Answer the following two questions A paper chromatography experiment was conducted on a mixture of amino acids including Aspartic acid (Asp), Glutamic acid (Glu), Histidine (His), Leucine (Leu), Phenylalanine (Phe) and Proline (Pro). The following Rf values were determined: Asp (0.245), Glutamic (0.275), His (0.295), Leu (0.745), Phe (0.685) and Pro (0.445). In the experiment, a colored spot for unknown amino acid "W" was found centered at a distance 25 mm from the start line when the solvent line had...
Scientific Calculator Answer the following two questions: 1. A paper chromatography experiment was conducted on a mixture of amino acids including Aspartic acid (Asp), Glutamic acid (Glu), Histidine (His), Leucine (Leu), Phenylalanine (Phe) and Proline (Pro). The following Rf values were determined: Asp (0.245), Glutamic (0.275), His (0.295), Leu (0.745), Phe (0.685) and Pro (0.445). In the experiment, a colored spot for unknown amino acid "W" was found centered at a distance 25 mm from the start line when the...
"R" group polarity nonpolar, polar, or polar with H-
bonds.
1. choose any two know amino acids with similar Rf and based on the
size and polarity of their side chains, give an explanation for why
their retention factors are similar.
2. choose any two known amino acids with very different Rf values
and based on the size and polarity of their side chains, give an
explanation for why their retention factors are dissimilar.
3. Explain why lysines Rf is...
In complete sentences on the back of this page or on a separate piece of paper answer the following questions. (5 pts each) 1. Choose any two known amino acids with similar R and based on the size and polarity of their side chains, give an explanation for why their retention factors are similar. 2. Choose any two known amino acids with very different Rr values and based on the size and polarity of their side chains, give an explanation...
D. CHROMATOGRAPHY Chromatography is a general technique that is used to separate various materials. In this case, students can use the unique chemistry of the amino acid to determine its migration in a specific solvent. The solutions of amino acids can be applied to the place and allowed to dry. The plate is placed in the solvent, and capillary action will carry the amino acids upward along the plate. The side chains, or R groups, can be characterized by their...
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...
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