Addition of #"sodium hydroxide"# to an #"acetic acid/sodium acetate buffer"# only marginally increases the #pH# of the solution. Why so?
From here, we learn that for a buffer solution...........
And thus addition of hydroxide ion results in rapid formation of
Given the equation, and the logarithmic term, during the titration,
Are you following this treatment? If no, raise a flag, and someone will help you.