9. Calculate the pH of 0.250 L of 0.36 M formic acid (CH2O2) – 0.30 M sodium formate (CHOżNa) buffer. The Ka for formic acid is 1.8 x 104. CH2O2 (aq) H20 (1) сно? (ag) + Hзо" (аq) + a. Calculate the pH of the above buffer after 0.0050 mol of NaOH have been added. Assume that the volume remains constant. b. Calculate the pH of the buffer after 0.0050 mol of HCI have been added to the original buffer (top of page). Assume that the volume remains constant.

9. Calculate the pH of 0.250 L of 0.36 M formic acid (CH2O2) – 0.30 M sodium formate (CHOżNa) buffer. The Ka for formic acid is 1.8 x 104. CH2O2 (aq) H20 (1) сно? (ag) + Hзо" (аq) + a. Calculate the pH of the above buffer after 0.0050 mol of NaOH have been added. Assume that the volume remains constant. b. Calculate the pH of the buffer after 0.0050 mol of HCI have been added to the original buffer (top of page). Assume that the volume remains constant.

Chemistry: An Atoms First Approach

2nd Edition

ISBN:9781305079243

Author:Steven S. Zumdahl, Susan A. Zumdahl

Publisher:Steven S. Zumdahl, Susan A. Zumdahl

Chapter14: Acid- Base Equilibria

Section: Chapter Questions

Problem 4RQ: A good buffer generally contains relatively equal concentrations of weak acid and conjugate base. If...

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A good buffer generally contains relatively equal concentrations of weak acid and conjugate base. If you wanted to buffer a solution at pH = 4.00 or pH = 10.00, how would you decide which weak acidconjugate base or weak baseconjugate acid pair to use? The second characteristic of a good buffer is good buffering capacity. What is the capacity of a buffer? How do the following buffers differ in capacity? How do they differ in pH? 0.01 M acetic acid/0.01 M sodium acetate 0.1 M acetic acid/0.1 M sodium acetate 1.0 M acetic acid/1.0 M sodium acetate
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