MISSED THIS? Read Section 17.9 (Pages 765-769) Consider a 0.14 M solution of a weak polyprotic acid (H₂A) with the possible values of Kal and Ka2 given here. Calculate the contributions to [H3O+] from each ionization step. At what point can the contribution of the second step be neglected? Express your answers in molarity to two significant figures separated by a comma. [5] ΑΣΦ Templates xxb √x x x [H3O+]₁, [H3O+]2= 3.7.10-³,6.0.10-5 x IXI X.10n X M
MISSED THIS? Read Section 17.9 (Pages 765-769) Consider a 0.14 M solution of a weak polyprotic acid (H₂A) with the possible values of Kal and Ka2 given here. Calculate the contributions to [H3O+] from each ionization step. At what point can the contribution of the second step be neglected? Express your answers in molarity to two significant figures separated by a comma. [5] ΑΣΦ Templates xxb √x x x [H3O+]₁, [H3O+]2= 3.7.10-³,6.0.10-5 x IXI X.10n X M
Chemistry
10th Edition
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Chapter1: Chemical Foundations
Section: Chapter Questions
Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Those some correctly and I need to show all work
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You have correctly determined the contribution to [H3O+] from the first ionization step. To
determine the contribution to [H3O+] from the second ionization step, prepare an ICE table
(where I represents initial, C represents change, and E represents equilibrium), showing the
change in the H3O+ concentration with the variable y and defining the equilibrium
concentrations in terms of the concentrations produced in the first step and the variable y.
Substitute these expressions into the expression for Ka2:
Solve it for y.
Ka2
=
[H3O+][A²-]
[HA-]](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fee22cf2f-b974-4b00-a3cf-09b388e7d65d%2F58da73ec-4bbb-4b25-ba0e-79169e26dc61%2Fnkq5dg_processed.jpeg&w=3840&q=75)
Transcribed Image Text:X Incorrect; Try Again; 3 attempts remaining
You have correctly determined the contribution to [H3O+] from the first ionization step. To
determine the contribution to [H3O+] from the second ionization step, prepare an ICE table
(where I represents initial, C represents change, and E represents equilibrium), showing the
change in the H3O+ concentration with the variable y and defining the equilibrium
concentrations in terms of the concentrations produced in the first step and the variable y.
Substitute these expressions into the expression for Ka2:
Solve it for y.
Ka2
=
[H3O+][A²-]
[HA-]
![MISSED THIS? Read Section
17.9 (Pages 765 - 769).
Consider a 0.14 M solution of a weak polyprotic
acid (H₂A) with the possible values of Kal and
Ka2 given here. Calculate the contributions to
[H3O+] from each ionization step. At what point
can the contribution of the second step be
neglected?
Kal = 1.0 × 10-4 and Ka2 = 1.0 x 10-6
Express your answers in molarity to two significant figures separated by a comma.
OF
[ΨΕΙ ΑΣΦ
Templates
Ab
√x √√x
[H3O+]1, [H3O+]2= 3.7.10 ³,6.0 10
x
x
IXI
?
X.10n
X
M](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fee22cf2f-b974-4b00-a3cf-09b388e7d65d%2F58da73ec-4bbb-4b25-ba0e-79169e26dc61%2Fv4tcfl_processed.jpeg&w=3840&q=75)
Transcribed Image Text:MISSED THIS? Read Section
17.9 (Pages 765 - 769).
Consider a 0.14 M solution of a weak polyprotic
acid (H₂A) with the possible values of Kal and
Ka2 given here. Calculate the contributions to
[H3O+] from each ionization step. At what point
can the contribution of the second step be
neglected?
Kal = 1.0 × 10-4 and Ka2 = 1.0 x 10-6
Express your answers in molarity to two significant figures separated by a comma.
OF
[ΨΕΙ ΑΣΦ
Templates
Ab
√x √√x
[H3O+]1, [H3O+]2= 3.7.10 ³,6.0 10
x
x
IXI
?
X.10n
X
M
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