Which of the following titration curves listed below best represents a curve for the complete titration of the weakly basic dianion, sulfide, S^{2 -}, with a strong acid such as HCl as shown below in the net ionic equation?
S^{2 -} (aq) + 2 HCl (aq) →H₂S (g) + 2 Cl^-

Question

Quizplus · Accepted Answer

The titration of a weakly basic dianion with a strong acid produces a titration curve with an initial flat region representing the buffering capacity of the weakly basic dianion, followed by a steep rise in pH as the equivalence point approaches. Curve C best represents this type of titration curve.

Which of the Following Titration Curves Listed Below Best Represents