Calculate the PH of a Buffer That Is 0

Multiple Choice

Calculate the pH of a buffer that is 0.058 mol L^-1 HF and 0.058 mol L^-1 LiF. The K_a for HF is 3.5 × 10^-4.

A) 2.86
B) 9.31
C) 10.54
D) 3.46
E) 4.69