For TLC plate separation, why do we use Rf values instead of distance measurements (e.g. the...
For TLC plate separation, why do we use Rf values instead of distance measurements (e.g. the spot travelled 5 cm from the starting line)? What would happen if we compared solvent systems using distances rather than Rf values?
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For TLC plate separation, why do we use Rf values
instead of distance measurements (e.g. the...
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...
why is the mel di Using the TLC slide drawn below, calculate the Rr values for...
why
is the mel
di Using the TLC slide drawn below, calculate the Rr values for each spot. See page /o in the lab manual for help. b. State which of the three known substances are present in the unknown by comparing the Unknown Rr values to the Rx values for the Known substances. See page 76 in the lab manual for help. You will need a metric ruler. Solvent front- Origin of spot lu 1 2 3 U =...
can you please answer all 1. When you run a TLC of the reaction in ethyl...
can
you please answer all
1. When you run a TLC of the reaction in ethyl acetate : hexanes 1:1, the plate below is produced. Give a solvent system that would be expected to produce greater separation and a BRIEF (8 words) justification about your choice. (5 points) 7 6 5 4 3 b. Calculate the R for the bottom spot. (5 points) c. Which compound on the TLC plate is the most polar? (5 points) 2. Why is it...
Post-Laboratory Questions Aspirin adnil tuleno Which compound turned out to be the most polar? The least polar? Do...
Post-Laboratory Questions Aspirin adnil tuleno Which compound turned out to be the most polar? The least polar? Do experimental results agree with your theoretical predictions? If not, why? 2. What would a chromatogram look like if a less polar developing solvent were used 3. Consider the following TLC plate of compounds A, B, and C developed in hexanes: solvent front starting line a) Determine the R values of compounds A, B, and C run on a silica gel TLC plate...
please do two pargraph about this pre lab and lab include Title,purpose ,chemical eqution if their...
please do two pargraph about this pre lab and lab include
Title,purpose ,chemical eqution if their any ،Procedure
,Hazards(hazard Identification,physical and chemical
properties),Experimental Phase, Data
&Observations,Data&Observations cont (melting point and
meling point). and Calcuations
Spinach Laboratory Procedure PROCEDURES Isolation of pigment from leaves: 1. Wash the spinach leaves. Weigh 1.0 g-2.0 g of dry spinach leaves. Remove any stems and veins from the leaves before you weigh. 2. Combine 1.0 g of anhydrous magnesium sulfate with 0.5 g of sand...
Please help answer questions for esterification pre-lab. 4. Why do we use DMSO to prep the...
Please help answer questions for esterification pre-lab.
4. Why do we use DMSO to prep the bio-sample rather than using Di water? (2 pts) 5. How does the KMnO4 stain detect the alcohol on the TLC plate? (2 pts)
worksheet torcyclohexene" 1. Why do we use H3PO4 instead of H2SO4 as a catalyst for the...
worksheet torcyclohexene" 1. Why do we use H3PO4 instead of H2SO4 as a catalyst for the synthesis of cyclohexene? (2 pts.) 2. Why do we use H3PO4 instead of HCl as a catalyst for the synthesis of cyclohexene? (3 pts.) 3. What alkeneſs) would be produced on dehydration of each of the following alcohols? If more than one product is possible, use Zaitsev's rule to predict which product would be formed in greater amounts. (9 pts.) Hz a) 2-methylcyclohexanol bi...
Chromatography: Separating Mixtures Introduction: Magic marker inks are often mixtures of several compounds. Paper chromatography is...
Chromatography: Separating Mixtures Introduction: Magic marker inks are often mixtures of several compounds. Paper chromatography is a common method of separating various components of a mixture. After separation, you can observe the different colors that make up a particular color of magic marker ink. You can also calculate a ratio Rf, which compares how far each compound traveled to how far each solvent (substance that dissolves another substance) traveled during the experiment. Rf = Ds/Df Ds = Distance traveled by...
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...
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)...
why
is the mel
di Using the TLC slide drawn below, calculate the Rr values for each spot. See page /o in the lab manual for help. b. State which of the three known substances are present in the unknown by comparing the Unknown Rr values to the Rx values for the Known substances. See page 76 in the lab manual for help. You will need a metric ruler. Solvent front- Origin of spot lu 1 2 3 U =...
can
you please answer all
1. When you run a TLC of the reaction in ethyl acetate : hexanes 1:1, the plate below is produced. Give a solvent system that would be expected to produce greater separation and a BRIEF (8 words) justification about your choice. (5 points) 7 6 5 4 3 b. Calculate the R for the bottom spot. (5 points) c. Which compound on the TLC plate is the most polar? (5 points) 2. Why is it...
Post-Laboratory Questions Aspirin adnil tuleno Which compound turned out to be the most polar? The least polar? Do experimental results agree with your theoretical predictions? If not, why? 2. What would a chromatogram look like if a less polar developing solvent were used 3. Consider the following TLC plate of compounds A, B, and C developed in hexanes: solvent front starting line a) Determine the R values of compounds A, B, and C run on a silica gel TLC plate...
please do two pargraph about this pre lab and lab include
Title,purpose ,chemical eqution if their any ،Procedure
,Hazards(hazard Identification,physical and chemical
properties),Experimental Phase, Data
&Observations,Data&Observations cont (melting point and
meling point). and Calcuations
Spinach Laboratory Procedure PROCEDURES Isolation of pigment from leaves: 1. Wash the spinach leaves. Weigh 1.0 g-2.0 g of dry spinach leaves. Remove any stems and veins from the leaves before you weigh. 2. Combine 1.0 g of anhydrous magnesium sulfate with 0.5 g of sand...
Please help answer questions for esterification pre-lab.
4. Why do we use DMSO to prep the bio-sample rather than using Di water? (2 pts) 5. How does the KMnO4 stain detect the alcohol on the TLC plate? (2 pts)
worksheet torcyclohexene" 1. Why do we use H3PO4 instead of H2SO4 as a catalyst for the synthesis of cyclohexene? (2 pts.) 2. Why do we use H3PO4 instead of HCl as a catalyst for the synthesis of cyclohexene? (3 pts.) 3. What alkeneſs) would be produced on dehydration of each of the following alcohols? If more than one product is possible, use Zaitsev's rule to predict which product would be formed in greater amounts. (9 pts.) Hz a) 2-methylcyclohexanol bi...
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...
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)...
Most questions answered within 3 hours.
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