Synergistic
solvent extraction of manganese(II) using a mixture
of Cyanex 272 and Cyanex 301 from chloride solutions has been studied
in the view of developing a chemical model. Slope analysis method
was used for the determination of extraction stoichiometry. The equilibrium
constant for the synergistic solvent extraction reaction was calculated
by taking into account of the complex formation reactions between
Mn(II) and chloride ions. The activity coefficients of species in
the aqueous phase were estimated by applying the Bromley equation.
The calculated distribution ratios of Mn(II) agreed well with the
experimentally measured values.