Conductances of Some Moderately Concentrated Solutions of Metallic Perchlorates in the Mixed Solvent Methanol-Acetone at Low Temperatures

Conductances and viscosities of solutions of lithium perchlorate in 50–50 wt % methanol ‐acetone at concentrations up to 4.75 M have been measured over the temperature range −50° to 20°C. Similar measurements have been made on solutions of magnesium, zinc, and strontium perchlorates to concentrations slightly above 1.0 M . 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 and 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.