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