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Electrostatic and Chemical Interactions of Ions and Electrolytes and in Ionic Point Charge Double Layers

By the application of the Madelung constant, , the Debye - Hückel radius, , is deduced directly from the definition of the average edge length of the cube, , which contains one ion of an 1-1 electrolyte. The theoretical function of activity coefficient with concentration, , is deduced assuming that the ion interactions are, along with the electrostatic free energy change, also under the influence of the chemical potential of cations and anions. The constant parameters, , , , and can be estimated by fitting the function to experimental sets of points of any electrolyte. Proposed is the theoretical function of electrokinetic quotient, , measured as electrophoretic mobility, or electroosmotic transport across membranes, or streaming current, or streaming potential on ionic strength or concentration, , which reads The theoretical function is defined by three constant parameters: = maximal electrokinetic quotient, = slope of the lines, = ionic strength defining , one independent variable, = molality, and one dependent variable = electrokinetic quotient. Constant parameters can be estimated by fitting the theo-ret-ical func-tion to experimental sets of elektro-kinetic points. Electrostatic potentials and replacing the classical Smoluchowki's and Henry's - potentials can be calculated from , and , which are obtained by fitting, by

Coagulation; Colloids; Electrokinetics; Electrolytes; Stability

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