A triprotic acid (H3A) has pKA values of 3.08 (pKa1), 5.39 (pKa2), and 7.70 (pKa3). Which of the equalities is true when the pH is 4.24? Which of the equalities is true when the pH is 6.55? What is the predominant species of H3A at pH 3.85? What is the predominant species of H3A at pH 9.09?

A triprotic acid (H3A) has pKA values of 3.08 (pKa1), 5.39 (pKa2), and 7.70 (pKa3). Which of the equalities is true when the pH is 4.24? Which of the equalities is true when the pH is 6.55? What is the predominant species of H3A at pH 3.85? What is the predominant species of H3A at pH 9.09?

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 96QRT

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Question

A triprotic acid (H3A) has pKA values of 3.08 (pKa1), 5.39 (pKa2), and 7.70 (pKa3).

Which of the equalities is true when the pH is 4.24?

Which of the equalities is true when the pH is 6.55?

What is the predominant species of H3A at pH 3.85?

What is the predominant species of H3A at pH 9.09?

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