a) From this flow chart, which acid is extracted when sodium bicarbonate is used as an extraction solvent? Explain, use knowledge of pKa, why this acid is extracted as opposed to the other acid present. b) What would be the end results if you first extract with NaOH, and then with NaHCO3? c) What would be the results after the addition of HCl to the NaOH extract and the NaHCO3 extracts?
a) From this flow chart, which acid is extracted when sodium bicarbonate is used as an extraction solvent? Explain, use knowledge of pKa, why this acid is extracted as opposed to the other acid present. b) What would be the end results if you first extract with NaOH, and then with NaHCO3? c) What would be the results after the addition of HCl to the NaOH extract and the NaHCO3 extracts?
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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a) From this flow chart, which acid is extracted when sodium bicarbonate is used as an extraction solvent? Explain, use knowledge of pKa, why this acid is extracted as opposed to the other acid present.
b) What would be the end results if you first extract with NaOH, and then with NaHCO3?
c) What would be the results after the addition of HCl to the NaOH extract and the NaHCO3 extracts?
Transcribed Image Text:Mixture dissolved in organic solvent: dichloromethane
но
benzoic acid
2-naphthol
1,4-dimethoxybenzene
Extract with 25 mL of 10% NaHCO3 (3 times)
organic layer
aqueous layer = NaHCO3 extract
separate
Na*
HO
+
2-паphthol
1,4-dimethoxybenzend
sodium benzoate
Extract with 25 mL of 10% NaOH (3 times)
Place on ice
Add HCl until pH< 3
organic layer
aqueous layer = NaOH extract
Na* Cr
`OH
Na
sodium chloride
benzoic acid
1.4-dimethoxvbenzene
precipitate
aqueous
Add Na,(SO4)
Place on ice
Add HCl until pH < 3
Filter
Evaporate dichloromethane
Recyrstallize in methanol
HO
Na* Ch
sodium chloride
2-naphthol
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