You will be doing chromatography with a mixture of n-propanol and water. Would it make sense...
You will be doing chromatography with a mixture of n-propanol and water. Would it make sense to add hexane to this mixture to try and make it work better? Explain.
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You will be doing chromatography with a mixture of n-propanol
and water. Would it make sense...
1. you will be doing chromatography with a mixture of water and n-propanol. would it make...
1. you will be doing chromatography with a mixture of water and n-propanol. would it make sense to add hexane to this mixture to try and make it work better? EXPLAIN 2. Two cars full of people took a trip today. car A had a lot of kids and stopped at lots of rest stops and gas stations to give them a break. Car B had just adults in it, and only stopped once. Of course Car B got to...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red,...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red, blue areen, and yellow. Think about what you know about colors and predict which of these might be a single colored compound and which ones might contain more than one. write down your prediction. If you have the colors listed and want a purple color, what would you do? 2) Put the following chromatography solvents in order of polarity as a chromatography solvent: acetone,...
7. (a) When you try separating an unknown mixture by reversed-phase chromatography with 50% acetonitrile/50% water,...
7. (a) When you try separating an unknown mixture by
reversed-phase chromatography with 50% acetonitrile/50% water, the
peaks are too close together and are eluted in the range k = 2-6.
Should you use a higher or lower concentration of acetonitrile in
the next run?
(b) When you try separating an unknown mixture by normal-phase
chromatography with 50% hexane/50% methyl t-butyl ether the peaks
are too close together and eluted in the range k = 2-6. Should you
use a...
A mixture contains acetone, methanol, 1-propanol, and water. The boiling points of the components are as...
A mixture contains acetone, methanol, 1-propanol, and water. The boiling points of the components are as follows: acetone (CH3COCH3), 50.5∘C methanol (CH3OH), 66∘C 1-propanol (CH3CH2CH2OH), 97∘C water H2O, 100∘C Which pair of the components would you expect to be the hardest to separate by distillation? Select the correct answer below: a. acetone and methanol b. acetone and 1-propanol c. acetone and water d. methanol and 1-propanol e. methanol and water f. 1-propanol and water
1. When 2-propanol was used as the developing solvent, two substances moved with the solvent front...
1. When 2-propanol was used as the developing solvent, two substances moved with the solvent front (Rf= 1) during TLC analysis on a silica gel plate. Can you conclude that they are identical? If not, what additional experiment(s) would you perform? 2. The Rf value of compound A is 0.34 when a TLC plate is developed in hexane and 0.44 when the plate is developed in diethyl ether. Compound B has an Rf value of 0.42 in hexane and 0.60...
Briefly explain how you would perform a quantitative analysis of the components of a mixture of...
Briefly explain how you would perform a quantitative analysis of the components of a mixture of ethanol, n-propanol, and iso-propanol using HPLC. Begin with the preparation of standard solutions. Explain how you would use the HPLC chromatogram to both identify the molecules and quantify the amount of each alcohol in the mixture. You don’t have to provide volume or concentration numbers or other technical experimental details. Provide a description of the general approach. Be complete and concise.
16. Would you expect 2-octanone to be soluble in water? Would you expect butanal to be...
16. Would you expect 2-octanone to be soluble in water? Would you expect butanal to be soluble in water? Would either of them be more soluble in hexane than in water? Explain. 25. Criticize the following techniques: isten (a) Heating a mixture that contains n-hexane using an open flame. (b) For a reaction, heating a mixture that contains a large amount of toluene using hot water bath. (c) Running s reaction with tert-butyl alcohol that is cooled to 0°C in...
These questions are from an experiment where we had a mixture of Ferrocene, acetylferrocene and diacetyl...
These questions are from an experiment where we had a mixture of Ferrocene, acetylferrocene and diacetyl ferrocene and we separated each by using column chromatography. Before doing the column chromatography we did TLC analysis to ensure that we did, in fact, have a mixture of these 3 compounds. During the column chromatography we first eluted the ferrocene using pure hexane. Then we eluted the acetylferrocene using a 1:1 mixture of hexane and methylene chloride. Then we eluted the diacetylferrocene using...
Do you think it would make more sense in terms of depreciation of assets for us...
Do you think it would make more sense in terms of depreciation of assets for us to follow IFRS, and use fair market value instead of predetermined depreciation amounts? Would fair market value be a better way of recording depreciation?
1-4 1. What would happen if you used a water-soluble pen on the chromatography paper to...
1-4
1. What would happen if you used a water-soluble pen on the chromatography paper to mark your origin line? How would this affect the Re values? 2. A student accidently adds 17 ml of NaCl to their beaker rather than the 7 mL of NaCl they were suppose to add to their beaker. How might this mistake affect their chromatogram? Do you think they would be able to obtain any data? Briefly explain your answer. 10 3. Is it...
Lab Day 8: Chromatography Prelab Questions 1) The basic food colors you can buy are red, blue areen, and yellow. Think about what you know about colors and predict which of these might be a single colored compound and which ones might contain more than one. write down your prediction. If you have the colors listed and want a purple color, what would you do? 2) Put the following chromatography solvents in order of polarity as a chromatography solvent: acetone,...
7. (a) When you try separating an unknown mixture by
reversed-phase chromatography with 50% acetonitrile/50% water, the
peaks are too close together and are eluted in the range k = 2-6.
Should you use a higher or lower concentration of acetonitrile in
the next run?
(b) When you try separating an unknown mixture by normal-phase
chromatography with 50% hexane/50% methyl t-butyl ether the peaks
are too close together and eluted in the range k = 2-6. Should you
use a...
1. When 2-propanol was used as the developing solvent, two substances moved with the solvent front (Rf= 1) during TLC analysis on a silica gel plate. Can you conclude that they are identical? If not, what additional experiment(s) would you perform? 2. The Rf value of compound A is 0.34 when a TLC plate is developed in hexane and 0.44 when the plate is developed in diethyl ether. Compound B has an Rf value of 0.42 in hexane and 0.60...
16. Would you expect 2-octanone to be soluble in water? Would you expect butanal to be soluble in water? Would either of them be more soluble in hexane than in water? Explain. 25. Criticize the following techniques: isten (a) Heating a mixture that contains n-hexane using an open flame. (b) For a reaction, heating a mixture that contains a large amount of toluene using hot water bath. (c) Running s reaction with tert-butyl alcohol that is cooled to 0°C in...
1-4
1. What would happen if you used a water-soluble pen on the chromatography paper to mark your origin line? How would this affect the Re values? 2. A student accidently adds 17 ml of NaCl to their beaker rather than the 7 mL of NaCl they were suppose to add to their beaker. How might this mistake affect their chromatogram? Do you think they would be able to obtain any data? Briefly explain your answer. 10 3. Is it...
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