Étude Viscosimétrique De Solutions Électrolytiques a Base De Sulfate De Cuivre

✍ Scribed by P. Claessens; CI. Feneau; R. Breckpot

• Publisher: Wiley (John Wiley & Sons)
• Year: 2010
• Weight: 561 KB
• Volume: 77
• Category: Article
• ISSN: 0037-9646
• DOI: 10.1002/bscb.19680770311

✦ Synopsis

It is shown that the viscosity can be correlated with the ional concentration,

of concentrated electrolyte solutions such as used in electrorefining and electrowinning of copper provided the molarities and respective valencies be taken for the metal and sulfate ions whilst all excess HzS04 be accounted for as Hi and HS04-. The coefficients in the equation qs = A " r f -t B " r + E " r 2 are practically independent, at a given temperature, of the uni-, bi-, and trivalent ions which have been considered, so that the viscosity can be estimated on basis of the sole composition up to values of r as high as 17.

The continuous variation of the free enthalpy of activation AC* with the total ional concentration shows also that the viscosity does not depend on the individuality of the cations but only on steric hindrance effects.

Combining the viscosities with diffusion coefficients of copper determined chronopotentiometrically shows that the Stokes-Einstein law may be used with a good approximation in such concentrated solutions.