Visualizing ConceptsThe following diagram represents a buffer composed of equal concentrat...

Visualizing Concepts

The following diagram represents a buffer composed of equal concentrations of a weak acid, HA, and its conjugate base, A–. The heights of the columns are proportional to the concentrations of the components of the buffer (a) Which of the three drawings, (1), (2), or (3), represents the buffer after the addition of a strong acid? (b) Which of the three represents the buffer after the addition of a strong base? (c) Which of the three represents a situation that cannot arise from the addition of either an acid or a base? [Section]