Challenging Pure chemistry?

When volume of acid was added to an alkali, how does pH change during the acid -base titration?



Thank you very much for your help.Challenging Pure chemistry?
';The pH will level off';??? I don't believe that Rhiz has ever done a titration. There is no ';leveling off'; at the equivalence point. Take a look at the graph of pH vs volume of added base for the titration of an acid.

http://library.tedankara.k12.tr/chemistr

or this one for the titration of a base by an acid:

http://www.chem.ubc.ca/courseware/pH/sec



Challenging Pure chemistry?
The pH will decrease progressively...



Should this be a strong acid-strong base titration, the pH will decrease progressively then rising or descending sharply (equivalence point) along pH 7...



In a strong acid-weak base titration... the drastic descent or equivalence point will be below pH 7...
It Depends On the Buffering Capacity.
There is a non-linear response. pH changes relatively rapidly until you reach a buffering point (not really a point), a narrow pH range where the dominant compound undergoes an ion change by the addition of H+ to the base form. the pH where this occurs depends on the stability relations between the H-base and H-free base ions. You see only a slight pH change in the immediate vicinity of this point because the H+ that is added is essentially immediately combined with the base ion. after you have converted essentially all of the base to the H-base, the pH will again change rapidly.