THE CONDUCTIVITY OF ROSANILINE HYDROCHLORIDE IN WATER 

 AND CERTAIN ORGANIC SOLVENTS. By HAROLD S. DAVIS, 

 B. A., Dalhonsie College.* 



Read March llth, 191-2. 



Within the last fifteen years, the knowledge of the con- 

 ductivity of electrolytes in solvents, other than water, has been 

 greatly increased. An historical summary of the work done 

 in this field up to 1903 is given by Walden. 1 



When a solute dissolves in a solvent to form a conducting 

 solution, the magnitude of the conductivity under given con- 

 ditions of temperature and concentration depends upon (1) the 

 solute, and (2) the solvent. But while investigation h s 

 hitherto extended to a wide range of solvents, only a very 

 limited number of solutes have been studied. Walden, for 

 example, who has been the principal worker on this subject, 

 confines his attention to tetra methyl ammonium iodide and 

 one or two of its homologues. As regards these salts, he has 

 shown 2 that the dissociation decreases as we advance in 

 homologous series, that is, is greater for tetra methyl ammonium 

 iodide than for the corresponding ethyl compound. 



He has further shown empirical relations 



(1) Between the dissociating power of a solvent and 



its dielectric constant. ^ 



(2) Between the temperature coefficient of conductivity 



of a solvent and the conductivity at infinite 

 dilution. 



(3) Between the dielectric constant of the solvents and 



the molecular dilution at which they show equal 

 dissociation of the same salt. 



,~irr*Contribntions from the Science Laboratories of Dalhousie University- [Chemistry 

 Printed in advance in th^ present part by permission of the Council of the Institute. 



1. Walden, P. : Zeitschr. f. phys. Chem., 46, 103, (1903). 



2. Walden, P. : Zeitschr. f phys. Chem , 54, 129, (1^06). 



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