Explain with background information. Confused how to approach this problem
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Explain with background information. Confused how to approach
this problem
plate coated with the stationary phase...
Please draw a thin chromatography plate with the following terms labelled 1. Origin 2. Stationary Phase...
Please draw a thin chromatography plate with the following
terms labelled
1. Origin 2. Stationary Phase 3. Mobile Phase 4. Solvent Front 5. Component "spot" 6. Rf value 7. Development 8. Visualization of spots Define questions 9 and 10 9. What is meant by differential partitioning between stationary and mobile phase? 10. What is the recommended procedure for cleaning a TLC spotting capillary?
3. If the TLC plate development had stopped before the solvent front reached the top of...
3. If the TLC plate development had stopped before the solvent front reached the top of the TLC plate (i.e. maybe it reached the middle of the TLC plate when it was stopped, instead): a) Would the Rf values have been affected? If so, how? If not, why not? Give a numerical example to support your answer. b) Would the size of the spots have been affected? If so, how? If not, why not? (Hint: think about the diffusion of...
2. A solution containing a mixture of naphthalene, benzoic acid, and benzaldehyde is analyzed via TLC...
2. A solution containing a mixture of naphthalene, benzoic acid, and benzaldehyde is analyzed via TLC and GC. Use the structures and properties of the compounds to aid in answering the following questions. A. In the TLC experiment, the mixture is spotted on a silica TLC plate and eluted with a 1:1 mixture of hexanes and ethyl acetate. Three spots are observed on the plate, with Re values of 0.25, 0.58, and 0.74. Indicate which spot corresponds to which compound....
slightly confused I thought thought Rf 0 was solid andRf1 is slightly liquid please any...
slightly confused I thought Rf 0 was solid and
Rf1 is slightly liquid please any help is greatly appreciated.3. Two extreme values for the Retention Factor are 0 and 1 a) Explain what each Re value means in terms of the substance's affinity for the mobile phase and for the stationary phase. b) Describe the features of molecules that would have these extreme Rr values under the conditions in this experiment: the solvent an 80:20 mix of petroleum ether and acetone, the...
Hi can someone help me with my pre lab theory questions (1,2,3) on rate of elution...
Hi can someone help me with my pre lab theory questions (1,2,3)
on rate of elution or Rf? Here is some background below. Please
help explain as many as possible (1-3)! I dont really get the
relation ships in this lab, thank you!
1. What factors affect the rate of elution in organic compounds? 2. Explain what is the relationship between polarities of compounds (polar/non- polar compound) and rate of elution (Rf). 3. Explain what is the relationship between solvent...
Didn't post this right the first time. Here is everything in full! Need help with Organic...
Didn't post this right the first time. Here is everything in
full!
Need help with Organic Chemistry, understanding the labs.
1. Soon you will synthesize the analgesic acetanilide in lab. It's me is 114°C. What does it indicate about your product if you obtain a mn of 103 - 112°C. Explain. acetanilide YO 2. Neither aniline nor nitrobenzene is particularly water soluble. However, one is completely soluble in dilute aqueous HCI. Which one is soluble, and explain why? (For maximum...
1. (5 pt.) Soon you will synthesize the analgesic acetanilide in lab. It’s m.p. is 114C....
1. (5 pt.) Soon you will synthesize the analgesic acetanilide in lab. It’s m.p. is 114C. What does it indicate about your product if you obtain a m.p. of 103 - 112C. Explain. 2. (6 pt.) Neither aniline nor nitrobenzene is particularly water soluble. However, one is completely soluble in dilute aqueous HCl. Which one is soluble, and explain why? (For maximum credit, provide a chemical equation for your answer.) 3. (5 pt.) Name the two adsorbents that are most...
Please explain what is going on in this lab for STEP 3. what are some important...
Please explain what is going on in this lab for STEP 3. what
are some important factors?
Multistep Synthesis Preparation of 4,4-Diphenyl-3-buten-2-one! This experiment illustrates se multistep synthesis, in which the the next. This process is very common iment illustrates several important concepts of organic synthesis. It is a synthesis, in which the product of one reaction becomes the starting material of This process is very common in industry and research, and demands careful to vields and techniques. The experiment...
QUESTIONS TO ANSWER: Prepare a table of all chemicals used with the structure and purpose of...
QUESTIONS TO ANSWER:
Prepare a table of all chemicals used with the structure and
purpose of each.
Calculate the theoretical yield by finding limiting reactant of
the experiment by converting reactants to product (remember to show
all calculations used)
Calculate the percent yield using the limiting reactant
Calculate the Rf for triphenylmethanol. If there are two dots,
determine which one is triphenylmethanol.. ( I did not provide
data. Please let me know how I Would do this if I did)...
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...
Please draw a thin chromatography plate with the following
terms labelled
1. Origin 2. Stationary Phase 3. Mobile Phase 4. Solvent Front 5. Component "spot" 6. Rf value 7. Development 8. Visualization of spots Define questions 9 and 10 9. What is meant by differential partitioning between stationary and mobile phase? 10. What is the recommended procedure for cleaning a TLC spotting capillary?
2. A solution containing a mixture of naphthalene, benzoic acid, and benzaldehyde is analyzed via TLC and GC. Use the structures and properties of the compounds to aid in answering the following questions. A. In the TLC experiment, the mixture is spotted on a silica TLC plate and eluted with a 1:1 mixture of hexanes and ethyl acetate. Three spots are observed on the plate, with Re values of 0.25, 0.58, and 0.74. Indicate which spot corresponds to which compound....
slightly confused I thought Rf 0 was solid and
Rf1 is slightly liquid please any help is greatly appreciated.3. Two extreme values for the Retention Factor are 0 and 1 a) Explain what each Re value means in terms of the substance's affinity for the mobile phase and for the stationary phase. b) Describe the features of molecules that would have these extreme Rr values under the conditions in this experiment: the solvent an 80:20 mix of petroleum ether and acetone, the...
Hi can someone help me with my pre lab theory questions (1,2,3)
on rate of elution or Rf? Here is some background below. Please
help explain as many as possible (1-3)! I dont really get the
relation ships in this lab, thank you!
1. What factors affect the rate of elution in organic compounds? 2. Explain what is the relationship between polarities of compounds (polar/non- polar compound) and rate of elution (Rf). 3. Explain what is the relationship between solvent...
Didn't post this right the first time. Here is everything in
full!
Need help with Organic Chemistry, understanding the labs.
1. Soon you will synthesize the analgesic acetanilide in lab. It's me is 114°C. What does it indicate about your product if you obtain a mn of 103 - 112°C. Explain. acetanilide YO 2. Neither aniline nor nitrobenzene is particularly water soluble. However, one is completely soluble in dilute aqueous HCI. Which one is soluble, and explain why? (For maximum...
Please explain what is going on in this lab for STEP 3. what
are some important factors?
Multistep Synthesis Preparation of 4,4-Diphenyl-3-buten-2-one! This experiment illustrates se multistep synthesis, in which the the next. This process is very common iment illustrates several important concepts of organic synthesis. It is a synthesis, in which the product of one reaction becomes the starting material of This process is very common in industry and research, and demands careful to vields and techniques. The experiment...
QUESTIONS TO ANSWER:
Prepare a table of all chemicals used with the structure and
purpose of each.
Calculate the theoretical yield by finding limiting reactant of
the experiment by converting reactants to product (remember to show
all calculations used)
Calculate the percent yield using the limiting reactant
Calculate the Rf for triphenylmethanol. If there are two dots,
determine which one is triphenylmethanol.. ( I did not provide
data. Please let me know how I Would do this if I did)...
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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