tate which modification of a “normal” recrystallization you would use in each case. Try and be as specific as you can for part a. a. You’re trying to recrystallize compound A, and find that it readily goes into both acetone and water, but does not dissolve in cyclohexane. And that’s all the solvents you have at your disposal for the lab. b. You want to purify a sample of 92% asparatame (an artificial sweetner) and 8% oxalic acid. Asparatame is not soluble at all in methanol at RT, but is very soluble at methanol’s boiling point. Oxalic acid is not soluble at all in methanol at any temperature. c. You want to purify some phenanthrene, and have a sample that is 95% phenanthrene and 5% intensely colored fluorene. Both have near similar solubilities in toluene, which is the recrystallization solvent you chose.
tate which modification of a “normal” recrystallization you would use in each case. Try and be as specific as you can for part a. a. You’re trying to recrystallize compound A, and find that it readily goes into both acetone and water, but does not dissolve in cyclohexane. And that’s all the solvents you have at your disposal for the lab. b. You want to purify a sample of 92% asparatame (an artificial sweetner) and 8% oxalic acid. Asparatame is not soluble at all in methanol at RT, but is very soluble at methanol’s boiling point. Oxalic acid is not soluble at all in methanol at any temperature. c. You want to purify some phenanthrene, and have a sample that is 95% phenanthrene and 5% intensely colored fluorene. Both have near similar solubilities in toluene, which is the recrystallization solvent you chose.
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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State which modification of a “normal” recrystallization you would use in each case.
Try and be as specific as you can for part a.
a. You’re trying to recrystallize compound A, and find that it readily goes into both acetone
and water, but does not dissolve in cyclohexane. And that’s all the solvents you have at your
disposal for the lab.
b. You want to purify a sample of 92% asparatame (an artificial sweetner) and 8% oxalic
acid. Asparatame is not soluble at all in methanol at RT, but is very soluble at methanol’s
boiling point. Oxalic acid is not soluble at all in methanol at any temperature.
c. You want to purify some phenanthrene, and have a sample that is 95% phenanthrene and
5% intensely colored fluorene. Both have near similar solubilities in toluene, which is the
recrystallization solvent you chose.
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