At either equivalence point, adding a drop of base will cause the steepest rise of the pH value in the system.
æɾ ˈiːðɚɹ ɪkwˈɪvələns pˈɔɪnt, ˈædɪŋ ɐ dɹˈɑːp ʌv bˈeɪs wɪl kˈɔːz ðə stˈiːpɪst ɹˈaɪz ʌvðə pˈiː ˈeɪtʃ vˈæljuː ɪnðə sˈɪstəm.