pH = 3.4 What are the equilibrium concentrations of H₂A and A²- in this soluti [H₂A] = [A²-] = 0.00043 Incorrect 8.3 x10-9

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 57QRT: The pH of a 0.10-M solution of propanoic acid, CH3CH2COOH, a weak organic acid, is measured at...
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The one that I got wrong, (in red), please fix

For the diprotic weak acid H₂A, Kal = 3.8 x 10-6 and K₁2 = 8.4 × 10-⁹.
What is the pH of a 0.0500 M solution of H₂A?
Ⓒ Machin
4
pH =
What are the equilibrium concentrations of H₂A and A²¯ in this solution?
O
IOI
R
3.4
[H₂A] =
F
[A²−] =
A: 1
%
5
0.00043
Incorrect
H
8.3 X10-9
T
G
a
16
6
30
Y
17
&
H
7
18
U
+
8
J
19
K◄◄
9
K
门
110
▶11
O
O
L
64°F 4»)
112
+
[
11
insert
}
M
]
M
6:57 PM
10/5/2022
prt sc
backsp
1
Transcribed Image Text:For the diprotic weak acid H₂A, Kal = 3.8 x 10-6 and K₁2 = 8.4 × 10-⁹. What is the pH of a 0.0500 M solution of H₂A? Ⓒ Machin 4 pH = What are the equilibrium concentrations of H₂A and A²¯ in this solution? O IOI R 3.4 [H₂A] = F [A²−] = A: 1 % 5 0.00043 Incorrect H 8.3 X10-9 T G a 16 6 30 Y 17 & H 7 18 U + 8 J 19 K◄◄ 9 K 门 110 ▶11 O O L 64°F 4») 112 + [ 11 insert } M ] M 6:57 PM 10/5/2022 prt sc backsp 1
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