Consider an amino acid (A) with no ionizable side chains, and call the three species involved in the acid/base equilibria H2A+, HA, and A- (see scheme below). Assume that pKa(1) = 2.0 and that pKa(2) = 9.0. Suppose that the total concentration of the amino acid is 1.0 mM. Report to two significant digits.

Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter16: Reactions Between Acids And Bases
Section: Chapter Questions
Problem 16.66QE: Write the chemical equilibrium and expression for the equilibrium constants for the ionization of...
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Consider an amino acid (A) with no ionizable side chains, and call the three species involved in the acid/base equilibria H2A+, HA, and A- (see scheme below). Assume that pKa(1) = 2.0 and that pKa(2) = 9.0. Suppose that the total concentration of the amino acid is 1.0 mM. Report to two significant digits. 

pH

[H2A+] (mM)

[HA] (mM)

[A-] (mM)

10.0

     
11.0

 

     

12.0

     
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