Solubilization as a Kind of Interphase Equilibrium

At the interphase equilibrium the electrochemical potentials of each substance in both phases are equal  

The solubilization changes the equilibrium constants of chemical reactions. For example, the equilibrium constant of the protolytic dissociation reaction  

If we determine the value of pK for the standard concentration of in aqueous phase, then  

The electrostatic potential of micelles can be determined from equilibrium or kinetic data. Fernandez and Fromherz [7] studied the acid-base equilibrium in the 

The micellar potential affects the rate constants if the reactants are located in different phases. Such an influence is illustrated by the rate constants of acridinium cation fluorescence quenching by the same anions at different ionic strengths of solution, which was changed by addition of NaCl (Fig. 1) [8]. The quenching is controlled by penetration of the anions into micelles of SDS and the relative values of the micellar potential can be calculated from the values of the quenching rate constants. The ratio of the quenching rate constants at two different values of the ionic strength can be written as follows  

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