Chapter 4
Potentiometry
INTRODUCTION
In 1889, Nernst proposed an equation which states that the electrochemical cell potential is directly proportional to the concentration of the sample solution. In 1906, Cremer explained that the potential difference exists between the reference electrode and the indicator electrode. In 1909, pH electrode is developed for the measurement of the potential. Potentiometry is mainly used to determine the potential or the electromotive force of a sample solution. The potential is directly proportional to the concentration of the ions. The potential difference is determined by the electrochemical cell which is composed of pair of electrodes namely the indicator electrode and the reference electrode.
PRINCIPLE
The ...
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