Multicomponent Polyelectrolyte Solutions. Part III. Determination of Activity of KCl in Potassium Polyvinylsulfonate Solutions by Use of a Cation-Sensitive Glass Electrode

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Abstract
The activities of KCl in potassium polyvinylsulfonate solutions have been investigated in cells without liquid junction as a function of temperature, electrolyte, and polyelectrolyte concentrations. Potassium‐sensitive glass electrodes in conjunction with Ag–AgCl electrodes were used. Results are expressed in terms of the ratio of the derivative of the emf with respect to polymer molality, at constant KCl molality, and the derivative of the emf with respect to KCl molality, at constant polymer molality. The relation of this quantity to membrane‐distribution coefficients is established and the results are compared with polyelectrolyte theory.