Volumetric, viscometric and ultrasonic studies of some nitrate compounds in aqueous binary mixture of tetrahydrofuran at various temperatures

Department of Chemistry, North Bengal University, Darjeeling-734 430, India

E-mail : mahendraroy2002@yahoo.co.in

Manuscript received 12 December 2002, revised 4 April 2003, accepted 23 May 2003 

The densities, viscosities and ultrasonic velocities of NH₄NO₃, KNO₃, Mg(N0₁)₂ and Ca(NO₃)₂ in a 20 mass% tetrahydrofuran + water mixture have been measured at 303, 308 313, 318 and 323 K. Apparent molar volumes (V_ᶲ,), viscosity B-coefficients and adiabatic compressibility of these electrolyte solutions are derived from these data supplemented with their densities, viscosities and ultrasonic velocities respectively. The limiting apparent molar volumes (V⁰_ᶲ) and experimental slopes (S^*_v) obtained from the Masson equation have been interpreted in terms of solute-solvent and solute-solute interactions, respectively. The viscosity data have been analyzed using the Jones-Dole equation. The results show that these electrolytes have structure breaking capacities in this solvent-mixture. The compressibility data also indicate the electrostriction of solvent molecules around the metal ions.