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= H+ + HPO;- Ka = 6.2 x 10-8 = H+ + SO?- Ka = 1.3 x 10-2 From the systems above, identify the conjugate pari that is best for preparing a buffer with a pH. of7.2. Explain your choice. Explain briefly how you would prepare the buffer solution described in (a) with the conjugate pair you have chosen. If the concentrations of both the acid and the conjugate base you have chosen were doubled, how would the pH be affected? Explain h pacity of the buffer is affected by this change in concentrations of acid and base.

= H+ + HPO;- Ka = 6.2 x 10-8 = H+ + SO?- Ka = 1.3 x 10-2 From the systems above, identify the conjugate pari that is best for preparing a buffer with a pH. of7.2. Explain your choice. Explain briefly how you would prepare the buffer solution described in (a) with the conjugate pair you have chosen. If the concentrations of both the acid and the conjugate base you have chosen were doubled, how would the pH be affected? Explain h pacity of the buffer is affected by this change in concentrations of acid and base.

Chemistry: Principles and Practice
Chemistry: Principles and Practice
3rd Edition
ISBN:9780534420123
Author:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Publisher:Daniel L. Reger, Scott R. Goode, David W. Ball, Edward Mercer
Chapter16: Reactions Between Acids And Bases
Section: Chapter Questions
Problem 16.87QE
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4. The equations and constants for the dissociation of three different acids are given below. HCO3 = H+ + CO?- K. = 4.2 x 10–7 -8 H;PO, = H+ + HPO- K. = 6.2 x 10 HSO, = H+ + SO?- Ka = 1.3 x 10–2 a. From the systems above, identify the conjugate pari that is best for preparing a buffer with a pH. of7.2. Explain your choice. b. Explain briefly how you would prepare the buffer solution described in (a) with the conjugate pair you have chosen. c. If the concentrations of both the acid and the conjugate base you have chosen were doubled, how would the pH be affected? Explain how the capacity of the buffer is affected by this change in concentrations of acid and base.
Transcribed Image Text:4. The equations and constants for the dissociation of three different acids are given below. HCO3 = H+ + CO?- K. = 4.2 x 10–7 -8 H;PO, = H+ + HPO- K. = 6.2 x 10 HSO, = H+ + SO?- Ka = 1.3 x 10–2 a. From the systems above, identify the conjugate pari that is best for preparing a buffer with a pH. of7.2. Explain your choice. b. Explain briefly how you would prepare the buffer solution described in (a) with the conjugate pair you have chosen. c. If the concentrations of both the acid and the conjugate base you have chosen were doubled, how would the pH be affected? Explain how the capacity of the buffer is affected by this change in concentrations of acid and base.
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