Electrical Conductivity of Concentrated Aqueous Mixtures of HCl and KCl in a Wide Range of Compositions and Temperatures

Abstract

The electrical conductivity of the HCl + KCl + H 2 O ternary system has been measured in a wide range of compositions (0 mol‚dm -3 < c HCl < 6 mol‚dm -3 and 0 mol‚dm -3 < c KCl < 1.2 mol‚dm -3 ) and temperatures (15 °C < t < 45 °C) making use of an automated station for conductometric titration based on the "electrodeless conductivity" technique. The experimental data obtained have been fitted to a polynomial in the HCl molar concentration, the KCl molar concentration, and the temperature. As a result, an empirical model enabling the interpolation of the conductivity of the chemical system under study within the limits of the variables investigated has been proposed.

Electrical Conductivity of Concentrated H2TiF6 + HF + H2O Mixtures

“…[18][19][20] It has already been used to measure conductivities of electrolyte solutions. 11,21,22 A full description of the system can be found elsewhere. 19 The procedure to calibrate the apparatus has also been previously described.…”

“…19 The procedure to calibrate the apparatus has also been previously described. [22][23][24] This procedure uses a polynomial in HCl concentration and temperature which correctly fits (RSD ) 0.41%) selected bibliographic data 25 to produce reference conductivity data from nearly (0 up to 1100) mS‚cm -1 .…”

“…Electrical conductivities were measured by means of an automated conductometric titration station (Figure ) fully controlled by a program written in QuickBasic, CONDUCTO. Both the experimental setup and the controlling software have been developed in our research group. − It has already been used to measure conductivities of electrolyte solutions. ,, A full description of the system can be found elsewhere 1 Automated system to measure the electrical conductivity of solutions.…”

The Impact of the Amount of Water Used in Activation Solution and the Initial Temperature of Paste on the Rheological Behaviour and Structural Evolution of Metakaolin-Based Geopolymer Pastes

“…When the 10 M NaOH is diluted with water, the degree of dissociation increases, which causes an increase in electrical conductivity. In the case of a strong electrolyte with a decrease in concentration, the interaction of ions with each other is weakened, which increases the speed of their movement and therefore the conductivity of the solution [32]. By increasing the water/10 M NaOH ratio in the AS used for the preparation of the geopolymer pastes, the electrical conductivity was increased.…”

“…By increasing the initial temperature of the paste, the mobility of ions and the electrical conductivity of the AS also increases [32], effecting an increase in the degree of dissociation in the solution followed by a decrease in the viscosity and the degree of ion hydration of the solution.…”