Calculate the PH of a Solution That Is 0 $\times$ 10^-4)and 0

Multiple Choice

Calculate the pH of a solution that is 0.50 M in HF (K_a = 7.2 $\times$ 10^-4) and 0.95 M in NaF.

A) 3.14
B) 3.42
C) 0.28
D) 10.58
E) 2.86