Cation Exchange Studies of Zinc Bromide and Iodide Complexes in Aqueous Acetone Solution

Abstract

The cation exchange method has been used to investigate the distribution equilibria between zinc bromide or zinc iodide complexes and the resin in aqueous acetone solutions. Formation constants of zinc bromide or iodide have been calculated from the distribution coefficients of zinc in aqueous acetone solutions containing 10, 20 and 30v/v% water. In 10v/v% aqueous acetone, β^Br₁=4.98, β^Br₂=8.81 and β^Br₃=11.55 for zinc bromide, β^l₁=3.97, β^l₂=5.55 and β^l₃=7.71 for zinc iodide, and in 20v/v% aqueous acetone β^Br₁=3.77, β^Br₂=5.97, β^Br₃=7.61, for zinc bromide and β^l₁=2.61, β^l₂=4.14 for zinc iodide, and in 30 v/v% aqueous acetone, β^Br₁=2.33 and β^Br₂=4.07 for zinc bromide.