Solvation behaviour of copper(II) chloride in some isodielectric media

Abstract

Solvation behaviour of copper(II) chloride has been investigated in formamide (FD) or N-methylformamide (NMFD) + 1,4-dioxane (D) or N,N-dimethylformamide (DMF) media, isodielectric with water (W) by emf measurements at 303.15 K on the Cu/Hg_x/CuCl₂ (FD or NMFD + D or DMF)/AgCl/Ag cell. The cell emf which varies as NMFD + D) < E(FD + D) < E(FD + DMF) has been shown, by graph-theoretical rationalization, to be dictated by the molecular species present in them. The dissociation constant, degree of dissociation of CuCl₂ and the standard cell potentials have also been determined, by iterative procedures, in these media. The molar Gibbs free energy of transfer of CuCl₂ from W→ (FD or NMFD + D or DMF) has also been determined and its analysis suggests that it arises, in the present case, due to changes in the interactions of the ions of CuCl₂ in these media.