The electrolytic conductance of Nickel(II), Copper(II) and Zinc(II) ions were investigated in the aqueous medium as well as in 1M Sulphuric acid, 1M Acetic acid and 1M Ammonia. Cu(II) ion shows lowest conductance in all the mediums indicating it forms stable complexes with the solvent molecules. Among the four mediums studied, the electrolytic conductance is lowest in water and very high in 1M sulphuric acid. The binary complexes of Ni(II) with L-glycine, L-serine, L-cysteine, L-glutamic acid, L-histidine and L-tyrosine were synthesized. The conductance of these complexes in all the four mediums were studied. The conductivity of the Ni(II)-amino acid complexes shows much lower values than that of the free metal ion, which shows that these solution complexes are quite stable. In all the systems investigated, the conductance sharply increases below 0.04M concentration. Hence we can assume that the solution complexes begin to dissociate below this concentration.
Conductivity, amino acids, Nickel complexes
