(a)
Interpretation: The 50 % ionization of benzoic acid at pH 4.2 needs to be determined if the pKa of benzoic acid is 4.2.
Concept Introduction: Bronsted and Lowry purposed the Bronsted-Lowry acid-base theory. It states that acid can give
(b)
Interpretation: The reason of precipitation of benzoic acid needs to be explained if the pH of an aqueous solution of benzoate ion is lowered to pH 7 by adding acid.
Concept Introduction:Bronsted and Lowry purposed the Bronsted-Lowry acid-base theory. It states that acid can give
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EBK EXPERIMENTAL ORGANIC CHEMISTRY: A M
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- For acid-base extractions: Explain what result would you expect if you accidentally extracted the mixture in the reverse order (HCl, NaOH, NaHCO3)? [instead of using NaHCO3 first, NaOH second, and then HCl third]arrow_forwardIn this experiment a mixture of approximately equal amounts of three compounds - benzoic acid, 2-naphthol, and hydroquinone dimethyl ether - will be separated by a series of liquid-liquid extractions and purified by recrystallization. The first two compounds are acidic (but of considerably different acid strengths) and the third is neutral. Discuss the purification technique used in this experiment, Liquid-Liquid extraction, how does it work? Which core principle does it rely on? (acid-base chemistry)- expand on this. How is acid-base chemistry used to extract compounds? To explain your answer, make sure to use the pKa's of the compounds in your discussion for evidence of how it works.arrow_forwardThe NaOH titrant in this experiment was prepared to be approximately 0.1 M and then was standardized to determine its exact concentration. What possible reasons could there be for not simply weighing the solid NaOH, dissolving to a known volume and calculating its molarity?arrow_forward
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