Which of the Following Would Be the Best Choice for Preparing

Multiple Choice

Which of the following would be the best choice for preparing a buffer with a pH = 8.0?

A) a solution of formic acid and sodium formate, K_a = 1.8 *10^-4
B) a solution of acetic acid and sodium acetate, K_a = 1.8 *10^-5
C) a solution of hypochlorous acid and sodium hypochlorite, K_a = 3.5 * 10^-8
D) a solution of boric acid and sodium borate, K_a = 5.8 *10^-10
E) All of these solutions would be equally good choices for making this buffer.