Discussion
A potentiometric titration locates the end point from the
Answer: A
Correct answer: sharp change in cell potential
An indicator electrode responds to the activity of the species being titrated, and at the end point that activity changes by orders of magnitude within a fraction of a millilitre, so the measured potential jumps. The end point is taken at the steepest part of the curve, most precisely from the maximum of the first derivative. Like the conductometric method it needs no visual indicator.
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