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.
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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