How to find the equivelance point of a compound when titrated with 2 M NaOH and given the Ka

(HPTX ) HPTX<---> H+ + PTX- the Ka is 1.2x10-9
(HMTN) HMTN<---> H* + MTN- the Ka is 7.3x10-4
if both compounds are titrated with 2M NaOH at what pH does the equivalence point occur for each compound?

what is the volume of NaOH used because this determines the number of moles NaOH used in the titration. the equivalence point is the point where the moles H+ = moles OH-
without this, we can't find the equivalence point