Abstract
Conductance measurements are reported for S-t-buisBr, S-n-buisBr, S-n-amisBr, and S-n-octisBr in pure water and in water-dioxane mixtures at 25°C in the dielectric constant range 13 <
D < 78.5. The data were analyzed by the Fuoss—Onsager equation for associated electrolytes and the characteristic functions are derived. A trial to obtain the transport number of the Br
− ion is described. The hydrodynamic radius is calculated for Br
− ion and for each of the four cations. Finally the association constant
K
A
is analyzed on the basis of the solvent separated-ion pair model.