Electrolytic conductance measurements and capacitive balance

Abstract

Paper No. 110. 1 The term ionic constituent refers to the ion-forming portion of an electrolyte, without specification of the extent of dissociation, association, solvation, etc. See, e.g., reference (4), p. 60. Thus the ionic constituents in an aqueous solution of CdR are Cd! + and I-, regardless of the fact that, the actual species in solution may include hydrated cadmium ions, anionic complexes such as Cdl4!_, etc. Measurements of macroscopic properties yield information only on the components (Cdl-j and water) or the ionic constituents. Unusual values of these properties may suggest the microscopic nature of the species (e.g., ions). More detailed information on the nature of the species requires measurements sensitive to the species properties and distribution (e.g., spectra).Alternative methods of conductance measurement are pointed out, as are some aspects pertinent to the measurement of dielectric constant. The extent of coverage can easily be modified to suit the level of the course and the time available.Phenomenology: Ohm's Law Applied to Electrolytes rent occurs whether the system be liquid, solid, or gaseous, single component or multicomponent. (See reference (47)).

A new probe for measuring electrolytic conductance

“…This is done in order to make comparison with eqns. (2) and (3) Rb=pK=KJu (4) where K (cm-l) is the so-called cell constant of the conductivity cell, which depends on the electrode surface area A, the spacing between the measuring electrodes 1 and a form factor k, correcting the effects of the inhomogeneous electrical field between the two electrodes due to the edges: K=kllA. The cell constant K was determined from the measurement results of Fig.…”

Water Quality Monitoring and Associated Distributed Measurement Systems: An Overview

“…For instance, almost invariably, alternating current is used in order to minimize the polarization effects [18]. Notwithstanding, these effects cause a nonlinear variation of the cell constant K C , that can only be compensated by calibration.…”

The Treatment of Ionic Solutions over the Entire Miscibility Range

“…by Braumstein and Braumstein [8]. These isopiestic data at 100°C can be converted to water activities by use of the vapor pressure data of Gibbard and Scatchard [9] for LiC£-H 2 0.…”