Frequently Asked Question

Potentiometric titration is a technique that involves monitoring the potential difference (voltage) between two electrodes in a solution as a titrant is added. Here's the principle:
1. Electrodes: A reference electrode maintains a stable potential, while an indicator electrode's potential varies depending on the analyte's concentration.
2. Titration: As the titrant is added, it reacts with the analyte, causing a change in the analyte's concentration. This change in concentration is reflected in the potential difference measured between the electrodes.
3. Equivalence Point: The equivalence point, where the analyte and titrant are stoichiometrically equivalent, is marked by a sharp change in potential. This point is identified on a plot of potential versus titrant volume.
4. Determination: The volume of titrant required to reach the equivalence point is used to calculate the concentration of the analyte.