DETERMINATION OF THE DIFFUSION COEFFICIENTS OF CuSO4, ZnSO4, AND NiSO4 IN AQUEOUS SOLUTION.

The diffusion coefficients of CuSO//4, ZnSO//4, and NiSO//4 in the aqueous solution systems of MSO//4 and MSO//4-H//2SO//4 were measured at 298 K using a diaphragm cell method and are listed as a function of molar concentrations of MSO//4 and H//2SO//4. It was found that the concentration dependencies of the diffusion coefficients in each single metal sulfate solution are similar. The presence of H//2SO//4 generally causes a less significant concentration dependency of the diffusion coefficients of MSO//4. The concentration dependencies of the diffusion coefficients of CuSO//4 in aqueous solutions of CuSO//4 and CuSO//4-H//2SO//4 are attributed to changes in the mean activity coefficient of CuSO// 4 and the viscosity of the solutions.