A study on viscosities of some bivalent transition metal nitrates and magnesium nitrate in aqueous and binary aqueous mixtures of DMF at different temperatures

摘要

Viscosities for the solutions of some bivalent transition metal nitrates viz.manganese nitrate,cobalt nitrate,nickel nitrate,copper nitrate and zinc nitrate;and magnesium nitrate,at different concentrations have been determined in aqueous and in binary aqueous mixtures of N,N-dimethyl formamide(DMF)at 303.15 K and in aqueous and in 5%(w/w)DMF + water at five different temperatures.The data have been evaluated using the Jones-Dole equation and the obtained parameters have been interpreted in terms of ion-ion and ion-solvent interactions.The activation parameters of viscous flow have been obtained which depicts the mechanism of viscous flow.The transition metal nitrates and magnesium nitrate act as structure breakers in aqueous and in binary aqueous mixtures of DMF.