POSTLAB QUESTIONS 1. How can you improve the efficiency of an extraction procedu

Question

POSTLAB QUESTIONS 1. How can you improve the efficiency of an extraction procedure without changing the extracting solvent to some other solvent? 2. What would happen if you first extracted the ether solution of the mixture of an organic acid and base with aqueous NaOH solution Instead of aqueous HCI? Would this make any difference in the overall results? Explain 3. When two Immiscible solvents are mixed two layers form. Liquid-liquid extractions commonly use organic solvents that are less dense than aqueous solutions and, therefore, form the top layer. An exception to this rule is chlorinated solvents which are often more dense than aqueous solution and form the bottom layer. Suppose you were unsure which layer was which during your extraction, how would you determine which layer is the aqueous layer and which is organic?

Explanation / Answer

1. The efficiency of extraction improved by conducting many small extractions instead of one big extraction. Because the amount of substance extracted is more in many small extractions than the amount of substance extracted in one big extraction. Here, big extraction means extraction conducted by taking larger volume in a single extraction.

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