< 0 0 HDR 3.57 3.63 A 1.50L buffer solution is 0.250M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 0.0500 moles of solid NaOH. Assume no volume change upon the addition of base. The Ko for HF is 3.5 x 104. 2.89 3.34 22/27 O 3.46 Henderson Edit MacBook Air C