A diprotic acid (H₂A) has pKa values of 4.20 (pKal) and 8.40 (pKa2). Which of the equalities is true when the pH is 4.20? [HA] = [A²-] [H₂A] = [A²-] O [H₂A] = [HA] What is the predominant species of H₂A at pH 2.52? HA H₂A OA²- What is the predominant species of H₂A at pH 10.50? HA™ Which of the equalities is true when the pH is 8.40? [H₂A] = [HA] [HA] = [A²-] O [H₂A] = [A²-] What is the predominant species of H₂A at pH 7.01? A²- H₂A HA™
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![A diprotic acid (H₂A) has pKa values of 4.20 (pKal) and 8.40 (pKa2).
Which of the equalities is true when the pH is 4.20?
O [HA] = [A²-]
O [H₂A] = [A²-]
O [H₂A] = [HA¯]
What is the predominant species of H₂A at pH 2.52?
HA
O H₂A
O A²-
What is the predominant species of H₂A at pH 10.50?
HA
2-
Which of the equalities is true when the pH is 8.40?
O [H₂A] = [HA]
O [HA] = [A²-]
O [H₂A] = [A²-]
What is the predominant species of H₂A at pH 7.01?
O A²-
O H₂A
O HA™](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fa50e57d1-2bd6-427e-801e-187552a1e482%2Fed270b0a-69b2-49ca-846b-03d9a4839807%2F4h1orzr_processed.jpeg&w=3840&q=75)
Given:
The pKa1 for H2A = 4.20
The pKa2 for H2A = 8.40
We have to find the predominant species at pHs 2.52, 7.01, and 10.50.
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