Calculating pH. Chemistry Help??? 10 pts!!!?

uming volume of the solution is one liter, HF (2-1) + NaOH (1-1)------> NaF ( 1mole) Hence in the solution HF= 1mole NaF = 1.5 moles , It is an acidic buffer. PH = PKa + log salt/ acid, PH= 3.14 + log 1.5/1 , PH=3.316 which is nearly equal to 3.32 hence D is answer.