State whether the following statement is true or false:
An acid-base extraction technique can be used to separate a mixture of carboxylic acid and phenol into its pure components.

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Solution

An acid base extraction technique can be used to separate a mixture of carboxylic acid and phenol into its pure components.
Extraction of a solution of carboxylic acid and phenol in $C C l_{4}$ with aqueous solution of $N a H C O_{3}$ will bring carboxylic acid in aqueous phase as RCOONa leaving phenol in organic phase.

The acid-base extraction procedure can also be used to separate very weak acids from stronger acids and very weak bases from stronger bases, as long as the difference of their pKa

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