Extension de la méthode du «logarithme limite» [1] pour la détermination de la composition et de la constante de stabilité des complexes

A study of the conditions of applicability to weak complexes of the relation log x = v log V + log (β v , c C c ) = f(log V ), where V and C are variable and constant total concentrations of the constituants of the complexe, shows that for conditions other than C ≫ V , another function φ(log V ) accounts better for the formation equilibrium of the complexe. From f(log V ) and φ (log V ) a relation t (log V ) is derived whose simple analysis permits the determination of the composition and the stability constant of weak complexes. Applications are given to 1:1, 1:2, 2:2 composition.