The plot of pH versus titrant volume in a titration is called what?

• A. Titration Curve
• B. Indicator
• C. Equivalence Point
• D. Endpoint

Answer: (A)

In titration practice, the graph of pH as a function of the volume of titrant added is called a titration curve. This curve shows how the acidity or basicity of the solution changes as the reaction proceeds, starting from the initial pH, then gradually changing, and undergoing a sharp rise around the equivalence point when the amounts of acid and base are stoichiometrically equal. The endpoint is the observed color change of an indicator, which is a practical signal and may not coincide exactly with the equivalence point, which is the actual stoichiometric point. So the plotted relationship you’re examining—the pH versus added titrant volume—is the titration curve.