A 1.00 L buffer solution is 0.350M in HF and 0.150M in NaF. Cakculate the pH of the solution after the addition of 0.0500 moles of HCl. Assume no volume change upon the addition of acid. The pK a for HF is 3.46. 5.014.062.193.312.86 QUESTION 10 Determine the pH of a 0.276MNH3 solution at 25C. The Kb of NH3 is 1.8105 \begin{tabular}{ll} 3.21 \\ 13.12 \\ \hline 11.35 \\ 2.65 \\ 6.84 \end{tabular}