An Electrodic Model for the Membrane Potential

under no applied potential condition, within the present hypothesis, the potential difference across the membrane should now refer to the revesible situation, i.e., to the difference of the reversible redox 

FIGURE 4. Schematic diagram showing the oxidation and reduction reactions occurring at membrane-solution interface at side 1 and side 2 of a membrane. 

The slope of the variation of E with E will then be given by 

Experimentally, the relative concentrations of the redox couple on the cathodic side were held constant, so that 

If it is now assumed that the current, i, at the steady state is flowing across the membrane at a constant rate, the dildAE,) — 0, and hence, from (6.21), 

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