How does a Buffer Work?

A buffer works with Buffing solutions which act as neutralizing agents that contain both positive and negative ions of a weak acid. Thus, if a base such as NaOH is added to the solution, the positive H+ ions will react with the negative (OH-) ions to neutralize the solution. Similarly, if an acid is added to the buffer, the negative ions (such as OH- or C2H3O2-) will react with the hydronium ions to neutralize the solution.