A 250 ML Sample of 0

Multiple Choice

A 25.0 mL sample of 0.150 mol L^-1 hydrofluoric acid is titrated with a 0.150 mol L^-1 NaOH solution. What is the pH before any base is added? Hydrofluoric acid is monoprotic. The of hydrofluoric acid is 3.5 × 10^-4.

A) 2.33 × 10^-3
B) 2.63
C) 3.46
D) 7.07 × 10^-3
E) 2.15