Dielectric constants, densities, and viscosities of N‐methylacetamide, dimethylformamide, and of mixtures of these liquids have been determined at five temperatures. Conductances, densities, and viscosities of solutions of sodium and potassium bromides and potassium iodide in various mixtures of these solvents have been measured at ten‐degree intervals from 20° to 50°C. Variations in the dielectric constant of the solvent over the range 35–165 showed no influence on the degree of dissociation of these salts; they are essentially completely dissociated in all of the solvent mixtures studied. Differences in mobilities of the ions are explained in terms of various specific types of solute‐solvent interactions.

Conductances and viscosities of solutions of lithium perchlorate in 50-50 wt % methanol-acetone at concentrations up to 4.75M have been measured over the temperature range -50 ~ to 20~ Similar measurements have been made on solutions of magnesium, zinc, and strontium perchlorates to concentrations slightly above 1.0M.The maximum, which appears in the plot of conductivity as a function of concentration, shifts toward lower concentrations as the temperature is decreased. It has been shown that the four solutes studied exhibit very similar behavior a.ud that the properties of solutions of the mixed solutes in this system depend primarily upon the total electrolyte concentration rather than the particular salts used.Addition of water causes an increase in conductivity at room temperature; however, at low temperatures the presence of water markedly decreases the conductivity. ) unless CC License in place (see abstract). ecsdl.org/site/terms_use address. Redistribution subject to ECS terms of use (see 128.192.114.19 Downloaded on 2015-05-30 to IP

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