Arsenic acid, a triprotic acid, has 3 pKa values (2.24, 6.96, and 11.50). What is the predominate form of arsenic acid at a pH of 4.00? H3A H2A– A3– The predominate form of arsenic acid cannot be determined from the given information. HA2–

Arsenic acid, a triprotic acid, has 3 pKa values (2.24, 6.96, and 11.50). What is the predominate form of arsenic acid at a pH of 4.00? H3A H2A– A3– The predominate form of arsenic acid cannot be determined from the given information. HA2–

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

Arsenic acid, a triprotic acid, has 3 pK_a values (2.24, 6.96, and 11.50). What is the predominate form of arsenic acid at a pH of 4.00?

H₃A
H₂A^–
A^3–
The predominate form of arsenic acid cannot be determined from the given information.
HA^2–

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