The number of moles of weak monoprotic acid?

Hydrazoic acid, HN3, and butyric acid, HC4H7O2, are both weak monoprotic acids. Their pKa values (at 25oC) are 4.72 and 4.82, respectively. What is [C4H7O2-] in a solution in which the stoichiometric concentrations of HN3 and HC4H7O2 are 0.165 mol/L and 1.19x10-6 mol/L, respectively? Give your answer with three significant f ...continues

What is the Final pH of NaOH and HA when mixed together?

What is the final pH at 25oC when 93.0 mL of 0.133 mol/L NaOH(aq) and 50.0 mL of 0.193 mol/L HA(aq) are mixed. Assume that HA is a weak monoprotic acid with pKa=5.31 at 25C. Give your answer accurate to two decimal places.