Final answer:
Surface titration is conducted to find Zeta Potential by measuring the potential difference between a reference electrode and an indicator electrode as the titrant is added to the titrand.
Step-by-step explanation:
Surface titration is conducted to find Zeta Potential by measuring the potential difference between a reference electrode and an indicator electrode as the titrant is added to the titrand. The Zeta Potential is a measure of the electrical charge at the surface of a particle or interface. In surface titration, the potential of the indicator electrode varies with the change in surface charge during the titration.
For example, in the case of Zeta Potential measurement in colloidal systems, a redox indicator electrode, such as a platinum electrode, is used as the indicator electrode. The potential of the indicator electrode is monitored while adding a titrant that can change the surface charge of the colloidal particles. The change in potential indicates the point at which the surface charge is neutralized and the Zeta Potential is determined.