Intradiffusion coefficients in perchloric acid solutions: Water at 5°C; water and perchlorate ion at 25°C

Intradiffusion coefficients for tritiated water (³HHO) and perchlorate ion (³⁶ClO₄^-) were measured in perchloric acid solutions. At 5°C the diffusion coefficient measured for the tritiated species increases to a maximum near 1.3 mol-dm^–3. The data at 25°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 are similar to the respective coefficients in hydrochloric acid solutions.