Calculate the pH of a buffer solution prepared by dissolving 1.79 mol of HF and 2.26 mol of NaF in water to make a total volume of 1.25 L of solution. The Ka of HF is 6.8*10^-4.
A) 3.57
B) 3.47
C) 3.27
D) 3.37
E) 3.68
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