Homework Answers
The elutropic series (order of polarity) for silica gel and alumina is as follows: hexane. petroleum ether is a generic name given to a mixture of pentanes, hexanes and heptanes. It does not contain any ethers of the R-O-R' structure.) < carbon tetrachloride < toluene < dichloromethane < chloroform < diethyl ether < ethyl acetate < acetone < propanol < ethanol < methanol < acetic acid < water.
Add Answer to:
In general, what is the correct order of solvents when using Column Chromatography?
What is the main purpose of running a column chromatography? Similar to TLC. column chromatography is...
What is the main purpose of running a column chromatography? Similar to TLC. column chromatography is based on analytes being partitioned between a stationary phase (not moving) and a mobile phase (moving). What is most commonly used as stationary phase in a column? Is this material polar or non-polar? In this experiment, you will use different solvents to run column chromatography separation of different pigments extracted from spinach leaves. These solvents are a mixture of acetone and hexanes. (a) What...
What physical property separates substances in column chromatography( and chromatography in general)?
What physical property separates substances in column chromatography( and chromatography in general)?
4. Know the eluting power/polarity of solvents for column chromatography 5. Know what constitutes a halogenated...
4. Know the eluting power/polarity of solvents for column chromatography 5. Know what constitutes a halogenated compound vs a non-halogenated compound 6. Know the factors involved in determining the rate of an Sn1 reaction
Generally, what is the ideal Rf value of the analyte when using TLC to choose a solvent for column chromatography?
Generally, what is the ideal Rf value of the analyte when using TLC to choose a solvent for column chromatography?
devise a way to separate alcohol from ester using column chromatography. Please describe the general procedure....
devise a way to separate alcohol from ester using column chromatography. Please describe the general procedure. A few sentences are enough.
column chromatography: (-)-carvone, (+)-limonene and (-)-dihydrocarveol In what order to you expect to collect the compo...
column chromatography: (-)-carvone, (+)-limonene and (-)-dihydrocarveol In what order to you expect to collect the components from the column? Explain.
The column chromatography procedure for the separation of a polar and a non- polar compound calls...
The column chromatography procedure for the separation of a polar and a non- polar compound calls for sequential elution with the following solvents: hexane, 70:30 hexane : acetone, acetone and 80:20 acetone : methanol. Why it is important to follow this solvent order?
When it comes to column chromatography, What is the purpose of irradiating azobenzene? Why does the...
When it comes to column chromatography, What is the purpose of irradiating azobenzene? Why does the cis-azobenzene move through the column more slowly than the trans-azobenzene?
1. What are the main differences between thin layer chromatography (TLC) and column chromatography (CC)? 2. Are CC...
1. What are the main differences between thin layer chromatography (TLC) and column chromatography (CC)? 2. Are CC and TLC operations conducted concurrently? Explain. 3. Name a few packing materials used in packing columns in Column Chromatography operations. 4. Explain the role of eluting solvent(s) in column chromatography procedures. 5. When performing column chromatography, which of the following compounds would you expect to elute first: Ferrocene of acetylferrocene? Explain why.
What are the advantages and disadvantages of thin-layer chromatography, adsorption column chromatography, and gas chromatography techniques?...
What are the advantages and disadvantages of thin-layer chromatography, adsorption column chromatography, and gas chromatography techniques? (advantages and disadvantages for each type)
What is the main purpose of running a column chromatography? Similar to TLC. column chromatography is based on analytes being partitioned between a stationary phase (not moving) and a mobile phase (moving). What is most commonly used as stationary phase in a column? Is this material polar or non-polar? In this experiment, you will use different solvents to run column chromatography separation of different pigments extracted from spinach leaves. These solvents are a mixture of acetone and hexanes. (a) What...
4. Know the eluting power/polarity of solvents for column chromatography 5. Know what constitutes a halogenated compound vs a non-halogenated compound 6. Know the factors involved in determining the rate of an Sn1 reaction
1. What are the main differences between thin layer chromatography (TLC) and column chromatography (CC)? 2. Are CC and TLC operations conducted concurrently? Explain. 3. Name a few packing materials used in packing columns in Column Chromatography operations. 4. Explain the role of eluting solvent(s) in column chromatography procedures. 5. When performing column chromatography, which of the following compounds would you expect to elute first: Ferrocene of acetylferrocene? Explain why.
Most questions answered within 3 hours.
-
Employee training can
be defined as planned organizational efforts to help employees
learn job-related knowledge, skills,...
asked 18 minutes ago -
Which for loop is implemented correctly in Java?
Group of answer choices
for (i = 0...
asked 1 hour ago -
Required information
[The following information applies to the questions
displayed below.]
In 2019, Alliant Corporation acquired...
asked 1 hour ago -
How much must I invest today if I want to withdraw 1/3 of my
original investment...
asked 3 hours ago -
What is meant by a “term premium”?
What can explain such a premium? Is it a...
asked 5 hours ago -
23. Which molecule has only covalent bonds? A. CO2 B. Al2O3 C.
Mg3N2
24. The octet...
asked 5 hours ago -
the
total pressure for a mixture of N2O4 and NO2 is 2.20 atm. If Kp=
7.10...
asked 5 hours ago -
Delaware Corp. prepared a master budget that included $22,385
for direct materials, $28,600 for direct labor,...
asked 5 hours ago -
For pesticide HCB (hexachlorobenzene), its logarithmic partition
coefficient log Kow is 5.6. What would be the...
asked 5 hours ago -
A chemist requires 0.422 mil Na2CO3 for a reaction. How many
grams does this correspond to?
asked 5 hours ago -
If the vapor pressure of carvone is approximately 9.4 torr at 99
°C, approximately how much...
asked 5 hours ago -
A juice bottling company is carrying out a test at 10%
significance that the mean population...
asked 6 hours ago