Chapter 17, Problem 42QP

The following diagrams represent solutions at various stages in the titration of a weak acid HA with $\text{NaOH}$. Identify the solution that corresponds to (1) the initial stage before the addition of $\text{NaOH,}$ (2) halfway to the equivalence point, (3) the equivalence point. (4) beyond the equivalence point. Is the $\text{pH}$ greater than, less than, or equal to 7 at the equivalence point? Water and ${\text{Na}}^{\text{+}}$ ions have been omitted for clarity.