Electrical conductance of a mixture of sodium and potassium nitrates in aqueous medium

Abstract

Electrical conductance and density measurements of [xNaNO3 + (1 − x)KNO3] + RH2O system were taken as functions of x, R, and temperature. The mixed alkali effect on molar conductance (Λ) was found to be negligible upto R = 25 and becomes significant in the region where R < 25. It has been shown that for mixed electrolytic system in aqueous medium the concentration range at which the mixed alkali effect on Λ starts becoming significant can be predetermined by plotting the difference in Λ of the two pure electrolytic solutions versus R. The concentration dependence of Λ has been described satisfactorily by the expression Λ = ΛFLK exp (Bc + Cc2) where ΛFLK is the Falkenhagen–Leist–Kelbg equation for Λ, B and C are empirical constants, and c is the molar concentration. The observed values of the ion-size parameter have indicated more ionic association in KNO3 solution than in NaNO3 solution. Keywords: electrical conductance, sodium nitrate, potassium nitrate, mixed alkali effect.

Mixed alkali effect in sodium thiocyanate–potassium thiocyanate – acetamide melt systems

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Viscosity and Speed of Sound of Potassium Nitrate and Lithium Nitrate in Poly(ethylene glycol)

“…Studies on the mixed alkali effect 1-5 (MAE) and its phenomenological influence on the isotherms of dynamic properties (electrical conductivity, viscosity, and diffusion) as functions of composition and temperature in molecular liquid media 6,7 are limited. Recently, the MAE has been investigated using a mixed alkali cation pair in poly-(ethylene oxide) and poly(propylene oxide), which differ from low molar mass solvent systems in the mechanism of cation transport.…”