I need to find the mL hydroiodic acid in this problem

What volume of a 0.360 M hydroiodic acid solution is required to neutralize 23.9 mL of a 0.190 M barium hydroxide solution?

_______ mL hydroiodic acid

A 20.8 mL sample of 0.304 M triethylamine, (C2H5)3N, is titrated with 0.341 M hydroiodic acid.

(1) Before the addition of any hydroiodic acid, the pH is (2) After adding 7.53 mL of hydroiodic acid, the pH is

(3) At the titration midpoint, the pH is

(4) At the equivalence point, the pH is

(5) After adding 26.5 mL of hydroiodic acid, the pH is

Please show step by step instructions,

many thanks!