Molar volume, viscosity and conductance of zinc 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 303.15K, 308.15K, 313.15K and 318.15K. The solute-solvent interactions for zinc sulphate in water and various compositions of aqueous mannitol have been inferred from o v f , B-coefficient of Jones-Dole equation and o m L values. The structure making/breaking behavior of zinc sulphate is inferred from the sign of [ ¶2 o v f / ¶ T2]p, dB/dT and temperature coefficient of Walden product i.e. d( o m L ηo)/dT values. It has been found that zinc sulphate behaves as structure-breaker in water as well as in 2, 4 and 6 wt. % of aqueous mannitol solutions from molar volume, viscosity and conductance studies. The energy of activation for zinc sulphate in different compositions of aqueous mannitol is calculated from conductance and viscosity data and it has found that EΛ is less than Eη.
