The effect of solubility of sparingly soluble salts with negligible complex formation with common anions upon potentials of electrodes of the second kind is treated quantitatively. An expression for the electrode potential as a function of the actual solution composition is given and shows good agreement with measurements on the A&A@(s) electrode at chloride concentrations comparable to, and below, the solubility of AgCl. Literature data on the cell Li/LiCl(m& in DMSO)/TlCl(s)/Tl,Hg are corrected for TlCl solubility in DMSO at low LiCl concentrations. R&sun&-L'effet de la solubilitd de scls peu solubles, dont la complexation avec des anions est negligeable, sur le potentiel des electrodes de second genre est d&z-it quantitativement. 11 est dorm6 une expression pour le potentiel d'electrode comrne fonction des concentrations effectives, et qui montre un bon accord avec les mesures effectu&s sur l'&ctrode Ag/AgCl(s) pour les concentrations de chlorure voisines et au-dessous de la solubilit6 de AgCI. Les dorm&s bibliographiques sur la cellule: Li/LiCl(m&cl dam DMSO)/TICl(s)/Tl,Hg sont corriges a I'kgard de la solubilite de TIC1 ause faibles concentrations de LiCl. Zusammenfassun~-Der Einflul.3 der Liislichkeit schwerI&licher Salze, deren Komplexbildung mit gemeinsamen Anionen vernachllssigbar gering ist, auf das Potential von Elektroden 2. Art wird quantitativ behandelt. Ein Ausdruck fiir das Elektrodenpotential ah Funktion der tats&hlich vorliegenden Konzentrationen wird angegeben und xeigt gute Ubereinstimmung mit Messungen an der Ag/AgCl(s)-Elektrode bei Chloridkonxentrationen im Bereich und unterhalb der Loslichkeit des AgCl. Literaturdaten der Zdle Li/LiCl(mxiei in DMSO)/TICl(s)/Tl,Hg werden in l3exug auf die L6slichkeit von TlCl bei geringen LiCl-Konzentrationen korrigiert. ELECTRODES OF the second kind, M/MA(s)/M'A(&,* in solvent S), are basically defined as involving sparingly soluble salts of no or negligible complex formation with their common anion-l As discussed in part I,a at low common-anion electrolyte concentrations, the solubility of the salt cannot be neglected since it has an appreciable effect upon cel1 potentials. Deviations of measured and expected potentials can be calculated if the solubility product of the noncomplexing sparingly soluble electrolyte is available. THE ACTUAL SOLUTION COMPOSITION AND ITS EFFECT UPON ELECTRODE POTENTIALS The effect of solubility upon the actual solution composition is treated quantitatively for the following electrolytes. The sparingly solubIe salt, MA, is dissociated * Manuscript received