Answer to Question #306868 in Physical Chemistry for Chemistry

Question

A buffer solution is prepared by dissolving 1.50 g each of benzoic acid, C7H6O2, and

sodium benzoate, NaC7H5O2, in 150.0 mL of solution. [Ka = 6.3 x 10-5] a. What is the pH of this buffer solution? b. Which buffer component must be added, and in what quantity, to change the buffer pH to 4.00? c. What quantity of 2.0 M NaOH or 2.0 M HCl must be added to the original buffer to change the pH to 4.00.

Answer 1

The answer to your question is provided in the image: