engleski

Association Reaction of Na+ and Br- Ions in (70, 80, 90 and 95 Mass per Cent) tert-Butanol-Water Mixtures

Molar conductivities of electrolyte NaBr in tert-butanol-water mixtures (w_t-BuOH = 0.7, 0.8, 0.9, 0.95) were measured in a temperature range from 288.15 to 308.15 K at 5 K intervals. These data were processed by means of conductivity equations after Fuoss-Hsia and Lee-Wheaton. The obtained values for limiting molar conductivity (lambda_o), association constant (K_A) and distance parameter (R) were compared and discussed. The calculation was repeated for a two-parameter version of these equations with R=q_Bjerrum. The obtained association constants at different temperatures were used in determining the standard thermodynamic quantities of the association reaction of Na+ and Br- ions. These values were compared with literature data for the association of H+ and Br- ions.

sodium bromide ; tert-butanol-water mixtures ; conductivity ; ion-association ; thermodynamic quantities

projekt 1-07-122