Ephedrine, a central nervous stimulant, is used in nasal sprays as decongestant. This compound is a weak organic base: C10H15ON(aq) + H2O(l)  C10H15NOH+(aq) + OH-(aq) Kb has the value of 1.4 x 10-4. What pH would you expect for a 0.035 M solution of ephedrine, assuming that no other substances are present? What is the value of pKa for the conjugate acid of ephedrine?

Chemistry: The Molecular Science
5th Edition
ISBN:9781285199047
Author:John W. Moore, Conrad L. Stanitski
Publisher:John W. Moore, Conrad L. Stanitski
Chapter14: Acids And Bases
Section: Chapter Questions
Problem 118QRT
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. Ephedrine, a central nervous stimulant, is used in nasal sprays as decongestant. This compound is a weak organic base:

C10H15ON(aq) + H2O(l)  C10H15NOH+(aq) + OH-(aq)

Kb has the value of 1.4 x 10-4. What pH would you expect for a 0.035 M solution of ephedrine, assuming that no other substances are present? What is the value of pKa for the conjugate acid of ephedrine?

 

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