Why would a solvent with a very high boiling point be inappropriate for a recrystallization? Too much solvent would be lost to evaporation during the heating phase of the recrystallization Impurities and the compound to be recrystallized would dissolve equally well in this solvent A high boiling solvent would not dissolve the compound to be recrystallized It would be difficult to remove residual solvent from the purified crystals

Why would a solvent with a very high boiling point be inappropriate for a recrystallization? Too much solvent would be lost to evaporation during the heating phase of the recrystallization Impurities and the compound to be recrystallized would dissolve equally well in this solvent A high boiling solvent would not dissolve the compound to be recrystallized It would be difficult to remove residual solvent from the purified crystals

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter80: Crystallization: Purification Of Solids

Section: Chapter Questions

Problem 4P

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Similar questions

A lower and/or broader melting point range for a compound after recrystallization most likely results from ________. insoluble impurities such as dust or lint the material still being wet with the recrystallization solvent the compound decomposing in the heated solvent the compound undergoing a chemical reaction with the solvent
You have completed your recrystallization process, but you did not get any crystals back after you cooled your solvent. Troubleshoot this situation. Briefly describe reasons why your crystals did not form, and describe how you will get them back.
for effective purification by recrystalization while avoiding performing a hot gravity filtration, what is the desired solubility of an impurity at different temperatures? Hot solvent solvent after cooling
Which of the following should be done if there is no recrystallization due to the unsaturation of the solution? (mixed solvent recrystallization) a. Crystal seeding b. Scratching the inner walls or bottom of container c. Further boiling of solvent d. Adding small amount of sample
After a recrystallization experiment, the crystals were dried very well. The melting point measurement of the crystals showed a large melting range. What should you do?
When isolating the solid after recrystallization using vacuum filtration what solvent should you use to aid in the rinse from the Erlenmeyer flask to the vacuum filter funnel? (Only pick one answer) Group of answer choices: Cold ethyl acetate Cold ethanol Hot ethyl acetate Hot ethanol Hot water Cold water None of the above, it should not be risned
Question: How to get rid of colored impurities in the recrystallization process? Explain that in detail
Discuss the purity of Acetanilide before and after crystallization based on melting points. Discuss the percent recovery after crystallization. Is water a good solvent for recrystallization ?
If we are recrystallizing a PURE compound, what will happen to the sample if we cool the solution rapidly, i.e., placing it on an ice bath without cooling it first at room temperature? Note: kindly disregard the effect of rapid cooling on the container used.
How can you tell that a compound is impure? (or pure?) What are the characteristics considered when taking a melting point? What is recrystallization? What is happening on a molecular level (videos are provided) How are solvents chosen for recrystallization? (single solvent or mixed-solvent system).What are the properties of a good solvent system? How are crystals collected?
Describe the errors which may cause an observed melting point range of a PURE sample to be: higher than the correct melting point broad in range
What should you do if there are insoluble impurities after heating up your sample in the recrystallization solvent? a. Add more solvent to dissolves the impurities. b. Gravity filter the hot solution. c. Pick out the insoluble particles with a spatula. d. none of the above.

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		Too much solvent would be lost to evaporation during the heating phase of the recrystallization
		Impurities and the compound to be recrystallized would dissolve equally well in this solvent
		A high boiling solvent would not dissolve the compound to be recrystallized
		It would be difficult to remove residual solvent from the purified crystals