Given the equilibrium of acetic acid dissociation: CH3COOH + H₂O CH3COO + H3O+ 1a. Calculate the pH of a 0.15 M solution of acetic acid (CH3COOH), which has a K₂ of 1.8 x 10-5 1b. What is the pH of a solution that is 0.15 M acetic acid and 0.15 M sodium acetate?

Chemistry & Chemical Reactivity
10th Edition
ISBN:9781337399074
Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel
Chapter16: Principles Of Chemical Reactivity: The Chemistry Of Acids And Bases
Section16.7: Calculations With Equilibrium Constants
Problem 16.5CYU: What are the equilibrium concentrations of acetic acid, the acetate ion, and H3O+ for a 0.10 M...
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Given the equilibrium of acetic acid
dissociation:
CH3COOH + H₂O CH3COO* + H3O+
1a. Calculate the pH of a 0.15 M solution of
acetic acid (CH3COOH), which has a K₂ of 1.8 x
10-5
1b. What is the pH of a solution that is 0.15 M
acetic acid and 0.15 M sodium acetate?
1c. Given that 1b describes a buffer, does the
change in pH from 1a to 1b make sense?
Transcribed Image Text:Given the equilibrium of acetic acid dissociation: CH3COOH + H₂O CH3COO* + H3O+ 1a. Calculate the pH of a 0.15 M solution of acetic acid (CH3COOH), which has a K₂ of 1.8 x 10-5 1b. What is the pH of a solution that is 0.15 M acetic acid and 0.15 M sodium acetate? 1c. Given that 1b describes a buffer, does the change in pH from 1a to 1b make sense?
If you wanted to prepare a buffer with a pH of
9.3, what acid would you use?
A) CICH₂COOH, Ka = 1.4 x 10-³
B
CH3COOH, Ka = 1.8 x 10-5
(c) H₂S, Ka = 9.8 x 10-8
C
D NH4CI, Ka = 5.6 x 10-10
Transcribed Image Text:If you wanted to prepare a buffer with a pH of 9.3, what acid would you use? A) CICH₂COOH, Ka = 1.4 x 10-³ B CH3COOH, Ka = 1.8 x 10-5 (c) H₂S, Ka = 9.8 x 10-8 C D NH4CI, Ka = 5.6 x 10-10
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