Briefly explain or describe the following: What is the difference between extrac

Question

Briefly explain or describe the following: What is the difference between extraction and washing? How would you determine which layer is the aqueous layer after you add NaHCO_3 solution to the ether solution of your compounds? Why is the NaOH extract heated before acidification? What two visible evidences of reaction will you see when you acidify the NaHCO_3 extract with MCI solution? In which layer would p-toluic acid be more soluble if p-toluic acid were added to a two-layer mixture of tert-butyl methyl ether and water?

Explanation / Answer

washing is removing the impurites from substance.Extraction means addition of third compound to a mixture of compounds which has got preferential solubility in one of the componets of the mixture.

Aquesous layer will be denser and willl be at the bottom of the container.

NaOH extract is heated to get rid of any possible contaminants.

formation of precipitate at the bottom. this is due to fromation of salt when acid reacts with base.

p-toluic acid is more soluble in tert-butyl ether due to the affinity of cooh group of tolueic acid with ether.

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