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For extractions, why is it important to extract the organic mixture first with NaHCO3 and then...

For extractions, why is it important to extract the organic mixture first with NaHCO3 and then with NaOH but not the other way around (that is, extraction with NaOH before with NaHCO3) Explain.​ I have a mixture of benzoic acid, 2-naphthol, and diphenyl ether.

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