Viscosity measurements and structural properties in aqueous NiCl2 solutions

Abstract

We measured viscosity as a function of concentration in an aqueous solution of NiCl₂. We also measured compressibility and density in the same system. The data are discussed in the frame of existing phenomenological theories. In all cases it appears that some structural changes take place at a given concentration. We also propose a new phenomenological equation that describes the viscosity in terms of a function of the concentration, that turns out to have a rather universal character being able to describe also the behavior of other properties such as compressibility and density. The building up of some sort of structure can easily be revealed by such a treatment, also in comparison with other experimental results.