Question

Is the percent difference of a sample being titrated between the average indicator and potentiometric results significant? Justify?

Answer 1

If there is a significant difference, in the potentiometric titration pH readings are taken with the potentiometer which helps to more easily identify the equivalence point, besides not needing the use of an acid-base indicator as in the volumetric titration. In the volumetric titration a visual indicator is usually used, which is very susceptible to error by the observer, unlike the potentiometric titrations that are more accurate because the potential follows the real change of the activity, and therefore, the end point will match directly with the equivalence point.