Partial molar volumes of Cobalt nitrate and Nickel nitrate in water and binary aqueous mixtures of DMSO at different temperatures

Partial molar volumes of cobalt nitrate and nickel nitrate have been determined in water and binary aqueous mixtures of dimethyl sulfoxide (5,7,9 and 12% by weight of dmso) at 308.15 k with the help of density measurements. effect of temperature on the partial molar volumes was also studied for these salts in water and binary aqueous mixtures of dmso. results obtained have been analyzed by masson's equation and the experimental values of slopes and partial molar volumes of these transition metal nitrates have also been interpreted in terms of ion-ion or ion - solvent interactions. limiting molar expansibilities have also been determined which are interpreted in terms of structure making or breaking capacities of transition metal nitrates. in the present study both the transition metal nitrates have been found structure breaker in water and binary aqueous mixture of dmso.