Visualizing ConceptsThe following figure represents solutions at various stages of the tit...

Visualizing Concepts

The following figure represents solutions at various stages of the titration of a weak acid, HA, with NaOH. (The Na+ ions and water molecules have been omitted for clarity.) To which of the following regions of the titration curve does each drawing correspond: (a) before addition of NaOH (b) after addition of NaOH but before the equivalence point (c) at the equivalence point (d) after the equivalence point? [Section]