Abstract
The diffusion coefficients of CuSO4, ZnSO4, and NiSO4 in the aqueous solution systems of MSO4 and MSO4-H2SO4 were measured at 298 K using a diaphragm-cell method, and are listed as a function of molar concentrations of MSO4 and H2SO4. It was found that the concentration dependencies of the diffusion coefficients for CuSO4, ZnSO4, and NiSO4 in each single metal sulfate solution are very similar. The presence of H2SO4 generally causes a less significant concentration dependency of the diffusion coefficients of MSO4. The concentration dependencies of the diffusion coefficients of CuSO4 in aqueous solutions of CuSO4 and CuSO4-H2SO4 are attributed to the changes in the mean activity coefficient of CuSO4 and the viscosity of the solutions.
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