# When an acid is added to a basic solution, what happens to the pH of the solution?

May 1, 2017

#### Answer:

Consider the graph of $p H$ versus volume of solvent added in the appropriate acid base titration...........

#### Explanation:

The graph depicts the titration of a strong base with a strong acid...

Well before equivalence, addition of the acid titrant only marginally affects solution $p H$; we are still in the basic regime. Towards equivalence, the $p H$ changes dramatically, as the last excess of $H {O}^{-}$ is neutralized. Beyond equivalence, addition of further titrant only marginally decreases solution $p H$.