Molar volume, viscosity and conductance studies of nickel sulphate in water and aqueous mannitol

Department of Chemistry, Himachal Pradesh University, Summer Hill, Shimla-171 005,
Himachal Pradesh, India
Manuscript received 17 March 2008, accepted 7 August 2008

Molar volume, viscosity and conductance of nickel sulphate in water and 2, 4 and 6 wt. % of aqueous mannitol
solutions have been evaluated from density, viscosity and conductance data respectively at temperatures 303.15,
308.15, 313.15 and 318.15 K. The solute-solvent interactions for nickel sulphate in water and various compositions of
aqueous mannitol have been inferred from \(\phi \)⁰_v, B-coefficient of Jones-Dole equation and  Ʌ\(_m^O\) values. The structure making/
breaking behaviour of nickel sulphate is inferred from the sign of [∂² \(\phi \)\(_V^O\)/∂T²]_p, dB/dT and temperature coefficient
of Walden product i.e. d(Ʌ\(_m^O\))/ղ₀)dT values. It has been found that nickel sulphate behaves as structure-breaker in water
and structure-maker in 2, 4 and 6 wt. % of aqueous mannitol solutions from molar volume, viscosity and conductance
studies. The energy of activation for nickel sulphate in different composition of aqueous mannitol have also been
calculated from conductance and viscosity data.