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4-Nitrobenzoic acid has a pKa of 3.41.

3-Fluorophenol has a pKa of 8.40.

Ethyl-4-aminobenzoate is a

basic compound.

You will need the following information: The pKa of HCl is -7; pKa of carbonic acid is 6.52 and the pKa of water is 15.


You have a mixture of 3-fluorophenol and ethyl-4-aminobenzoate that you wish to separate by extraction. The mixture is dissolved in methylene chloride.

Why can you not use NaHCO3 to separate one component from the other? (explain why NaHCO3 cannot either component into the aqueous layer).

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In the separation of a mixture of compounds by extraction that were dissolved in organic
layer, at least one compound should come in to the aqueous layer to get separated. Each
type only one...

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