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In this paper, the concentration functions of electrical conductivity and pH are determined for aqueous solutions of an ionic liquid based on diethanolamine and boric acid (DEAB). Correlations between the physicochemical properties of an aqueous solution of DEAB and the processes of dissociation of the system components were established. Charge carriers in DEAB solutions are shown to be anions. It was established that an aqueous solution of DEAB has unipolar electrical conductivity and anion-exchange properties with an anion transfer number of 0.79. [ABSTRACT FROM AUTHOR]

The calibration process for flow conductometric sensors of electrical conductivity and their concentration in solutions of NaOH, NaCl, and Na2CO3 are studied. Two-electrode sensors in glass tubes were used with platinum electrodes combined with the developed resistometer. The measuring system resistometer-sensor KSN-19, KSN-22, and KSN-23 operates on a pulsed alternating current at a frequency of 4 kHz. The calibration dependences of the concentration-resistance sensors in the above solutions were measured. Three main parameters of the sensors were determined by means of special software processing of the calibration data and their comparison with precise reference functions, namely, the "sensor constant" KS, KS1, and KS3. It is shown that all characteristic parameters of the sensors depend on the chemical composition of the analyzed medium, and they are not constants. Theoretical substantiations of the observed regularity are given. [ABSTRACT FROM AUTHOR]

The processes of ion transport are studied using the model of a single ion-exchanger particle. The MA-40 anion-exchange membrane is chosen as a model. The fundamental difference between the membrane model of the ion exchanger and the ion exchanger itself is that the electric potential inside the solid phase can be measured on the membrane due to a special design of the measuring device. This measurement is impossible in the ion exchanger itself. Due to the indicated feature of the chosen membrane model, it became possible to propose a simple mathematical model of the process for analyzing the potential dynamics graphs. The time-varying potentials are measured on both sides of the membrane using the AgCl/Ag reference electrodes. The dynamics of time changes in the potentials of the membrane surfaces is recorded. The time change in the membrane potentials reflects the process of establishing the ion-exchange equilibrium at the membrane-solution interface. The mechanism of transfer processes across the interphase boundary is discussed. [ABSTRACT FROM AUTHOR]

The dependence of the relative capacity and specific electron resistance of the NiOOH/Ni(OH) 2 active substance are studied as functions of the charge current and the sizing of the particles of the conducting additive of metal nickel. It is shown that, in the intensive charge modes, the conducting layer appears on the surfaces of the active substance particles. In the galvanostatic mode, this layer blocks the charging process at one end and, at the other, it enables the rapid increase of the oxygen output. [ABSTRACT FROM AUTHOR]