Transference number measurements of copper(I) perchlorate in binary mixtures of acetonitrile with water, methanol, acetone and N,N-dimethylformamide at 25 °C

Abstract

Transference numbers of ClO^–₄ and Cu⁺ in copper(I) perchlorate have been measured in the concentration range 0.01–0.12 mol dm^–3 in acetonitrile (AN) and in binary mixtures of AN with water (H₂O), methanol (MeOH), acetone (AC) and N,N-dimethylformamide (DMF) at 25 °C by the modified Hittorf method. The cation transference number shows a significant variation with the solvent composition, but decreases slightly with increasing salt concentration. The limiting cation transference numbers (t°₊) in various solvent systems have been evaluated by the Longsworth method of extrapolation. Limiting ion conductances (λ°_i) for Cu⁺ and ClO^–₄ in these solvent systems have also been reported.