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 30 v/v% water. In 10 v/v% aqueous acetone, β^Br₁=4.98, β^Br₂=8.81 and β^Br₃=11.55 for zinc bromide, β¹₁= 3.97, β¹₂=5.55 and β¹₃=7.71 for zinc iodide, and in 20 v/v% aqueous acetone β^Br₁=3.77, β^Br₂=5.97, β^Br₃=7.61, for zinc bromide and β¹₁=2.61, β¹₂=4.14 for zinc iodide, and in 30 v/v% aqueous acetone, β^Br₁=2.33 and β^Br₂=4.07 for zinc bromide.