Question

which point represents the half way point (or half-equivalence point) of the titration?

point b
point c
point d
point e

Explanation:

Identify the equivalence point

Using the Titration Curves knowledge point
The equivalence point is located at the center of the steepest vertical region of the titration curve. Looking at the provided graph, the pH drops sharply between pH 10 and pH 2. The point located exactly in the middle of this steep vertical drop is point D (at approximately pH 5.5). Thus, point D represents the equivalence point of this weak base-strong acid titration.

Determine the half-equivalence point

Using the Titration Curves knowledge point
The half-equivalence point (or halfway point) occurs when exactly half the volume of titrant needed to reach the equivalence point has been added. Visually, this is located in the flat buffer region of the curve, halfway along the horizontal axis from the start of the titration to the equivalence point. Since point D is the equivalence point, the halfway point along the volume axis corresponds to point B, which lies in the middle of the flat buffering region.

Answer:

• Point B (Correct answer)
• Point C
• Point D
• Point E