Titration color change duration
As an example, let's say you're titrating a strong acid with a strong base using phenolphthalein as an indicator. As you initially add the base to the acid, you may not see the color change occurring because the acid so readily neutralizes the added base. This is because of the large concentration of H+. As you approach a basic pH, however, concentration of H+ decreases and the acid is not able to neutralize the base as quickly. As the base disperses in the solution more slowly, the phenolphthalein will have time to react and show a slight color change.