What is the buffer range (for an effective 2.0 pH unit) for a benzoic acid/sodium benzoate buffer? [Ka for benzoic acid is 6.3 × 10-5]
A) 8.8 - 10.8
B) 7.4 - 9.4
C) 5.3 - 7.3
D) 4.7 - 6.7
E) 3.2 - 5.2
Correct Answer:
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