Displacement reaction in the concentration cells involving liquid zinc and cadmium alloys

The equilibrium constant of displacement reaction occurring in the concentration cell has been determined on the basis of the following parameters: (i) ΔF° T of the displacement reaction assuming ideal solutions for the salt and metal phases; (ii) data of dilute solutions of zinc in cadmium; (iii) thermodynamic properties of dilute solutions of and in eutectic obtained in this paper from formation cells. In this case of dilute solutions of zinc in cadmium the influence of displacement reaction is visible in the values of zinc activity coefficients at molar fraction resulting in deviations from the linear dependence of . Investigations enabled the calculation of the correction for the measured emf values, which when taken into account prove the linear character of over the range molar fraction in system.