Abstract
An examination has been made of the effect of concentration on the temperature dependence of fluid flow in solutions of alkaline earth chlorides, cupric chloride and ferric chloride. From the way in which the Arrhenius and Eyring parameters for fluid flow vary with concentration in these solutions it is tentatively suggested that Mg2+ in concentrations up to 0·05 m enhances the intrinsic structural properties of water, but Mg2+ above this concentration, the remaining alkaline earth cations, Cu2+ and the ferric chloride complex destroy water structure; in the ferric-chloride—water system above 0·25 m water structure is not only destroyed with rising concentration but there are imposed upon the system new and entirely different fluid hydrate structures. It is also concluded that a common mechanism, which depends on the hydration properties of the cation, is responsible for the flow characteristics of these solutions.
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