INTRADIFFUSION COEFFICIENTS OF ALL SPECIES IN AQUEOUS GALLIUM PERCHLORATE SOLUTIONS AND SOLUTION VISCOSITIES AT 25-DEGREES-C

Intradiffusion coefficients of all species (cation, anion and solvent) and viscosities have been measured for aqueous solutions of gallium p erchlorate in the concentration range 0 - 2.3 mol-kg-1 at 25-degrees-C . The perchlorate ion intradiffusion measurements were made using (ClO 4-)-Cl-36 as the tracer species in diaphragm cell experiments. The dev elopment of a Method to SyntheSiZe (ClO4-)-Cl-36 from Cl-36- by electr olysis is described. The perchlorate intradiffusion coefficients resul ts show a concentration dependence tha is very similar to that for D(C l-) in corresponding trivalent metal chloride solutions. A simple hydr ation analysis based on all the transport results estimates a total (e ffective) cation hydration for gallium within a 0 - 2 mol-kg-1 range o f 10 (+/- 1.5).