When is the end point reached and the volume of the HCl recorded in this reaction? I. When the color first disappears and returns in the flask. II. When equal amounts of HCl and NaOH are in the flask. III. When the color disappears and does not return in the flask.

Correct answer: B. III only

A. I only
B. III only
C. I and III
D. II and III
E. I, II, and III

Explanation

The end point is reached when the color of the indicator disappears and does not return. The color will first disappear temporarily before the end point but finally will not return.

Last updated 1 September 2026

When is the end point reached and the volume of the HCl recorded in this reaction? I. When the color first disappears and returns in the flask. II. When equal amounts of HCl and NaOH are in the flask. III. When the color disappears and does not return in the flask.

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