Which solution below would be the best choice for preparing a buffer with a pH =5.0?
A) formic acid and sodium formate, Ka = 1.8 * 10-4
B) acetic acid and sodium acetate, Ka =1.8*10-5
C) hypochlorous acid and sodium hypochlorite, Ka =3.5*10-8
D) 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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