Electrical Conductances of Tetraethylammonium Bromide and Tetrapropylammonium Bromide in 2-Ethoxyethanol (1) + Water (2) Mixtures at (308.15, 313.15, 318.15, and 323.15) K

The electrical conductances of the solutions of tetraethylammonium bromide (Et 4 NBr) and tetrapropylammonium bromide (Pr 4 NBr) in 2-ethoxyethanol (1) + water (2) mixed solvent media containing 0.25, 50, and 0.75 mass fractions of 2-ethoxyethanol ( w 1 ) have been reported at (308.15, 313.15, 318.15, and 323.15) K. The conductance data have been analyzed by the 1978 Fuoss conductance−concentration equation in terms of the limiting molar conductance (Λ 0 ), the association constant ( K A ), and the association diameter ( R ). These two electrolytes are found to exist essentially as free ions in the solvent mixtures with w 1 = 0.25 and 50 over the entire temperature range; however, slight ionic association was observed in the mixed solvent medium richest in 2-ethoxyethanol. The electrostatic ion−solvent interaction is found to be very weak for the tetraalkylammonium ions in the aqueous 2-ethoxyethanol mixtures investigated.