INTRADIFFUSION COEFFICIENTS IN PERCHLORIC-ACID SOLUTIONS - WATER AT 5-DEGREES-C - WATER AND PERCHLORATE ION AT 25-DEGREES-C

Intradiffusion coefficients for tritiated water ((HHO))-H-3 and perchl orate ion ((CLO4-))-C-36 were measured in perchloric acid solutions. A t 5-degrees-C the diffusion coefficient measured for the tritiated spe cies increases lo a maximum near 1.3 mol-dm-3. The data at 25-degrees- C have been used to calculate distinct diffusion coefficients, D(ij)d. As a precursor for those calculations, new estimates were made of the Onsager phenomenological coefficients, l(ij). The l(ij) and D(ij)d ar e similar to the respective coefficients in hydrochloric acid solution s.