How many moles of solid NaF would have to be added to 1.0 L of 2.16 M HF solution to achieve a buffer of pH 3.35? Assume there is no volume change.(Ka for HF = 7.2 × 10-4)
A) 3.5
B) 0.45
C) 0.75
D) 1.0
E) 1.6
Correct Answer:
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