4) Explain how two compounds in a mixture must be similar and/or different in order for...
4) Explain how two compounds in a mixture must be similar and/or different in order for hot filtration to be used as an effective method of separation of the two compounds.
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4) Explain how two compounds in a mixture must be similar and/or
different in order for...
In order for steam distillation to be effective, the organic compounds in the mixture must be...
In order for steam distillation to be effective, the organic compounds in the mixture must be ___. miscible with water less dense than water immiscible with water more dense than water
1.describe how you would separate a mixture of acetanilide and sand 2.water is a convenient solvent...
1.describe how you would separate a mixture of acetanilide and sand 2.water is a convenient solvent for recrsytallizing what type of compound. 3. why is fluted filter paper usually used when doing the hot filtration during a recrystallization. 4.describe how seed crystal are used in recrystallization. 5.explain the adage " like dissolve lik
10. Consider the separation of the mixture of the compounds shown below using TLC analysis using...
10. Consider the separation of the mixture of the compounds shown below using TLC analysis using silica gel plates. (2pts each) oso ooo a OH a) What would be a reasonable eluent that could be used to separate all three components on the TLC plate? Explain your reasoning. b) List the order of elution when using your proposed eluent. Explain your reasoning using complete sentences. c) What will be the effect on separation if you increase the polarity of your...
4. The compounds in a mixture separated by GC can be identified by their retention times....
4. The compounds in a mixture separated by GC can be identified by their retention times. If you Suructor nad not told you which peak in the GC chromatogram corresponded to which alker you didn't know the boiling points of the alkenes, how could you determine the identity or each peak by its retention time? Identities of the components in a mixture separated by GC can also be determined by the technique called "spiking". Suppose you had run a chromatogram...
3. A mixture of two miscible liquids with widely different boiling points is distilled. The temperature of the vapo...
3. A mixture of two miscible liquids with widely different boiling points is distilled. The temperature of the vapor is observed to plateau and then drop before rising again. Explain this temperature drop. (3 points) 4. If you doubled the length of the fractional distillation column, what would be the advantages and disadvantages? (3 points) 5. Why is better separation of two liquids achieved by slower heating of a mixture? (3 points)
Arrange the following four compounds in order of increasing Rf when using TLC plates similar to...
Arrange the following four compounds in order of increasing Rf when using TLC plates similar to those you used. Place lowest Rf on the left and highest Rf on the right. Explain how you arrived at your choices for full credit. n-heptane 1-heptanol Hexylmethyl ether n-heptanoic acid
9. A mixture (solution) of 3 different liquid compounds is formed. Each compound has the same...
9. A mixture (solution) of 3 different liquid compounds is formed. Each compound has the same condensed formula of C4H10O. Separate analyses of these compounds confirmed that none of the compounds has branching of C’s from the main chain of attached C atoms. Also one of the compounds experiences a weaker interparticle force as its dominant force than the other two. (a) Draw 3 possible preferred Lewis structures consistent with the above formula and information. It is desired to separate...
11. Arrange the following four compounds in order of increasing R, when using TLC plates similar...
11. Arrange the following four compounds in order of increasing R, when using TLC plates similar to those you used. Place lowest Rf on the left and highest Rf on the right. Explain how you arrived at your choices for full credit OH n-heptane 1-heptanol Hexylmethly ether n-heptanoic acid
4. A GC sample of a mixture of two compounds produces a single peak in the...
4. A GC sample of a mixture of two compounds produces a single peak in the chromatograph. Give two factors that you could change in the GC experiment to increase the resolution so that the two compounds are separated. 2 points Change 1 Change 2
2. Aliquid mixture contains two substances whose boiling points are only 10°C apart. Which method of...
2. Aliquid mixture contains two substances whose boiling points are only 10°C apart. Which method of distillation should be utilized to obtain a clean separation of the two substances. Explain. 3. Which of the following pairs of liquids could be separated by simple distillation? Why? a. Ethyl acetate (b.p. 77°C) & Phenol (b.p. 181.7°C) b. Cyclohexane (b.p. 80.7°C) & Toluene (b.p. 111C) C. Hexane (b.p. 69.10C) & Ethylbenzene (b.p. 136°C) 4. What effect would (a) an increase or (b) a...
In order for steam distillation to be effective, the organic compounds in the mixture must be ___. miscible with water less dense than water immiscible with water more dense than water
10. Consider the separation of the mixture of the compounds shown below using TLC analysis using silica gel plates. (2pts each) oso ooo a OH a) What would be a reasonable eluent that could be used to separate all three components on the TLC plate? Explain your reasoning. b) List the order of elution when using your proposed eluent. Explain your reasoning using complete sentences. c) What will be the effect on separation if you increase the polarity of your...
4. The compounds in a mixture separated by GC can be identified by their retention times. If you Suructor nad not told you which peak in the GC chromatogram corresponded to which alker you didn't know the boiling points of the alkenes, how could you determine the identity or each peak by its retention time? Identities of the components in a mixture separated by GC can also be determined by the technique called "spiking". Suppose you had run a chromatogram...
3. A mixture of two miscible liquids with widely different boiling points is distilled. The temperature of the vapor is observed to plateau and then drop before rising again. Explain this temperature drop. (3 points) 4. If you doubled the length of the fractional distillation column, what would be the advantages and disadvantages? (3 points) 5. Why is better separation of two liquids achieved by slower heating of a mixture? (3 points)
11. Arrange the following four compounds in order of increasing R, when using TLC plates similar to those you used. Place lowest Rf on the left and highest Rf on the right. Explain how you arrived at your choices for full credit OH n-heptane 1-heptanol Hexylmethly ether n-heptanoic acid
4. A GC sample of a mixture of two compounds produces a single peak in the chromatograph. Give two factors that you could change in the GC experiment to increase the resolution so that the two compounds are separated. 2 points Change 1 Change 2
2. Aliquid mixture contains two substances whose boiling points are only 10°C apart. Which method of distillation should be utilized to obtain a clean separation of the two substances. Explain. 3. Which of the following pairs of liquids could be separated by simple distillation? Why? a. Ethyl acetate (b.p. 77°C) & Phenol (b.p. 181.7°C) b. Cyclohexane (b.p. 80.7°C) & Toluene (b.p. 111C) C. Hexane (b.p. 69.10C) & Ethylbenzene (b.p. 136°C) 4. What effect would (a) an increase or (b) a...
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