Answered: For the equilibrium below, pKa1 = 7.9…

For the equilibrium below, pKa1 = 7.9 and pKa2 = 10.1. At what pH is [HA-] equal to [A2-]? H2A <=> H+ + HA- <=> 2H+ + A2- a) pH = 7.9 b) pH < 7.9 c) pH > 10.1 d) pH = 10.1

Biochemistry

9th Edition

ISBN:9781319114671

Author:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Publisher:Lubert Stryer, Jeremy M. Berg, John L. Tymoczko, Gregory J. Gatto Jr.

Chapter1: Biochemistry: An Evolving Science

Section: Chapter Questions

Problem 1P

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Question

For the equilibrium below, pKa₁ = 7.9 and pKa₂ = 10.1. At what pH is [HA^-] equal to [A^2-]?

H₂A <=> H⁺ + HA^- <=> 2H⁺ + A^2-

a) pH = 7.9

b) pH < 7.9

c) pH > 10.1

d) pH = 10.1

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