Decomposition Curves of Lithium Chloride in Pyridine and in Acetone: The Effect of Water

H. E. Patten, W. R. Mott
1907 The Journal of Physical Chemistry  
Introduction Lithium chloride is soluble in a number of organic liquids, and thus affords ready means for studying the effect of change in solvent upon the process of electrolysis. In the deposition of lithium from its chloride in a series of alcohols' we have considered only a simple solvent. This paper takes account of the influence of moisture on the electrolysis of lithium chloride in pyridine and in acetone, starting with the anhydrous solvents. Part I. Electrolysis of Lithium Chloride in
more » ... ithium Chloride in Pyridine During the electrolysis of a pyridine solution of lithium chloride in an open cell,s there is a marked increase in the cell resistance. Thus, in a series of decomposition-curve determinations, polarization values for the total cell ranged from 4.00' volts4 to 2.70 volts, and in sonie instances a rise of ten to a hundred fold was observed in the cell resistance. A preliminary attempt to take anode and cathode curves gave a polarization of 1.6 volts at the anode, and $0.4 volt at the cathode. As these solutions were not strictly anhydrous, it seemed advisable t o study the effect of water. So several solutions were made up with great care to exclude moisture, This work was carried out in the laboratories of physical chemistry and of applied electrochemistry a t the University of Wisconsin, and the authors wish to express their appreciation of the courtesy extended to them by Professor I,. Kahlenberg and by Professor C. F. Burgess. Jour. Phys. Chem., 8, 153 (1904). Compare, I,. Kahlenberg: Jour. Phys. Chem., 3, 602 (1899); also, Laszczynski and Gorski: Zeit. Elektrochemie, 4, 290 (1897). These decomposition points were determined by extending back the CR line t o the axis of the volts, thus subtracting the electromotive force used in overcoming the resistance of the e!ectrolyte from the total electromotive force applied at the cell terminals.
doi:10.1021/j150092a001 fatcat:fulcs6a7gfeadlwwpsqmnjdy7m