Answered: 1. Briefly discuss the roles of (1)…

1. Briefly discuss the roles of (1) placing tea bags in boiling water, and (b) addition of anhydrous sodium sulfate in the isolation of the alkaloid.

EBK A SMALL SCALE APPROACH TO ORGANIC L

4th Edition

ISBN:9781305446021

Author:Lampman

Publisher:Lampman

Chapter49: Sulfa Drugs: Preparation Of Sulfanilamide

Section: Chapter Questions

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Micelles and Biological Membrane

Micelles are the type of lipid molecules that organize themselves in spherical shape in aqueous solutions. The production of the micelle is a reply to the amphipathic behavior of fatty acids. It means that they consist of both hydrophobic regions and hydrophilic regions. In micelles, polar head groups (hydrophilic groups) produce an outer layer associated with water whereas nonpolar tails (hydrophobic groups) are organized in the interior.

Question

1. Briefly discuss the roles of (1) placing tea bags in boiling water, and (b) addition of anhydrous sodium sulfate in the isolation of the alkaloid.
2. Some procedures include the addition of sodium carbonate before liquid-liquid extraction. What is the purpose of this step?
3. Give at least three characteristics of dichloromethane that makes it a good extracting solvent for the alkaloid.
4. Why is it necessary to remove a stopper from a separatory funnel when the liquid is being drained from it through a stopcock?
5. What are emulsions? Why do they form during extractions? How is the formation of an emulsion minimized? How are emulsions removed?

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Some procedures include the addition of sodium carbonate before liquid-liquid extraction. What is the purpose of this step?

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a. Give at least three characteristics of dichloromethane that makes it a good extracting solvent for the alkaloid.b. Why is it necessary to remove a stopper from a separatory funnel when the liquid is being drained from it through a stopcock?c. What are emulsions? Why do they form during extractions? How is the formation of an emulsion minimized? How are emulsions removed?
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