Volumetric and Viscosity Properties of MgSO4/CuSO4 in Sucrose + Water Solutions at 298.15 K

Abstract

Apparent molar volumes VΦ,E for MgSO4, CuSO4, Na2SO4, NaCl, MgCl2, and CuCl2 and viscosity B-coefficients for MgSO4/CuSO4 in sucrose + water solutions were determined from density and viscosity measurements at 298.15 K. Infinite-dilution apparent molar volumes VΦ,E0 for Na2SO4, NaCl, MgCl2, and CuCl2 in sucrose + water solutions were evaluated. The VΦ,E0 values for MgSO4 and CuSO4 were obtained by an additivity method. An empirical equation VΦ,E = ∑i=0n ∑j=0m Pij miSmj/2E was used to relate the apparent molar volumes of MgSO4/CuSO4 to the molalities (mE and mS). Volumetric interaction parameters were also obtained from the transfer volumes of electrolytes. Activation energies ΔμE0⧺ were also calculated from the viscosity B-coefficients. Results show that the values of standard transfer volumes, viscosity B-coefficients, and ΔμE0⧺ are positive and increase usually with increasing sucrose content.