Titration of a Weak Acid by a Strong Base
Below is a graph of the titration curve for a typical weak acid with a typical strong base.
 
At the equivalence point, the solution contains sodium acetate, which has an anion, but not a cation, that hydrolyses. The acetate ions however do ionize to give a slightly basic solution. For this reason, at the equivalence point where all the acid has neutralized all the base, there is still the acetate ions in solution which ionize the water.