Resumen:
he main purpose of this paper is to develop a model for the ion transfer ofweak acids across liquid|liquid interfacesincluding ion pairing and non-ideal electrolyte solutions to calculate the half-wave potential. The mainequation derived in this model allows the simulation of different chemical systems, comprising multiple acidbaseequilibria, hydrophilic and hydrophobic neutral weak acids, and different anions, including ion-pair formationin the organic phase. Hence, several representative chemical systems are analysed in detail in order to demonstratethe usefulness of the model. In addition, simple criteria to evaluate the presence of ion-pairs in theorganic phase as well as the calculation of the apparent ion-pair formation constants are included