Thermodynamics of Ion‐Association of NaClO 4 in Aqueous‐Methanol and Aqueous‐Glycerol Using Conductance Measurements

The conductance of NaClO 4 at (25–45)°C in methanol‐H 2 O, and glycerol‐H 2 O mixtures in a concentration range up to 10 −2 M has been measured. The association constant, K A , values have been determined, where the conductometric data were analysed by a M S X computer using the Fuoss‐Aprano method. The K A values for NaClO 4 in methanol‐H 2 O are higher than in glycerel‐H 2 O mixtures, Also K A values increase as the proportional of methanol or glycerol increases in mixture. The thermodynamic parameters ΔH°, ΔG°, and ΔS° were also calculated. It is obvious that the entire process of the ionic association in those systems are endothermic ones. The Walden products, Λ o η were calculated for all systems investigated.