Components of Potentiometric Cells

The need for a rather lengthy discussion of the liquid junction potential was prompted by the fact that, in potentiometry, the information is obtained from the measurement of the cell voltage. 

Fifty percent of this information comes from the indicator electrode and the other half from the reference system, including the liquid junction. The inescapable fact is that the electrical circuit has to be completed and that the probability of failure is equally distributed between the three terms in (6.27). 

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