Compute for the pKa of benzoic acid (Ka = 6.3 × 10-5).

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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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ANSWER THE FOLLOWING WITH A COMPLETE SOLUTION.

  1. Compute for the pKa of benzoic acid (Ka = 6.3 × 10-5).
  2. What is the Kb of ammonia if its pKb is 4.75?
  3. What is the [OH-] of a solution if its pH is 5.69?
  4. Identify the [H+] of a solution with a pOH of 11.41. Identify if it is neutral, acidic or basic.
  5. What is the pH of a buffer prepared with 0.51 M disodium phosphate and 1.1 M sodium acid phosphate? (pKa of sodium acid phosphate = 7.21) 
  6. Compute the pH of a buffer containing 0.62 M boric acid (Ka = 5.90 × 10-10) and 0.45 M sodium borate.
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