Ternary Mutual Diffusion Coefficients of Aqueous NiCl₂ + NaCl and NiCl₂ + HCl Solutions at 298.15 K

Abstract

The influence of sodium chloride and hydrochloric acid on the diffusion of aqueous nickel chloride has been investigated by using Taylor dispersion to measure ternary mutual diffusion coefficients for aqueous solutions of NiCl 2 + NaCl and NiCl 2 + HCl at 298.15 K and carrier concentrations from (0.000 to 0.050) mol·dm –3 for each solute. Mutual diffusion coefficients estimated from limiting ionic conductivities using Nernst equations are used to discuss the composition dependence of the diffusion coefficients and the electrostatic mechanism for the strongly coupled diffusion of the solutes.