SOLVATION BEHAVIOR OF COPPER(II) CHLORIDE IN SOME ISODIELECTRIC MEDIA

Solvation behaviour of copper(II) chloride has been investigated in fo rmamide (FD) or N-methylformamide (NMFD) + 1,4-dioxane (D) or N,N-dime thylformarflide (DMF) media, isodielectric with water (W) by emf measu rements 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 th e molecular species present in them. The dissociation constant, degree of dissociation of CuCl2 and the standard cell potentials have also b een determined, by iterative procedures, in these media. The molar Gib bs 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 C uCl2 in these media.