Electrical Conductivity Studies of Tetraalkylammonium Bromides in Aqueous Solutions at Several Temperatures

Abstract

The molar elec. conductivities of tetramethylammonium, tetraethylamonium, tetra-n-propylammonium, and tetra-n-butylammomium bromides in aq. solns. at (278.15, 283.15, 288.15, 293.15, and 298.15) K have been measured in the concn. range from (0.002 to 0.04) mol·kg-1. The data were analyzed according to the low-concn. chem. model (lcCM) of Barthel. Values of the limiting molar conductivities, Λ∞, and assocn. consts., KA, were evaluated. Using known values for the limiting molar cond. of bromide ion, the limiting molar conductivities of the tetraalkylammonium cations were evaluated at all temps. The Walden product and the Eyring activation enthalpy were calcd. The results are discussed in terms of solute-solvent interactions.