A .FEW MEASUREMENTS ON THE ELECTRICAL CONDUCTIVITY 



OF ACETOPHENONE SOLUTIONS OF CERTAIN ORGANIC 



BASES AND ACIDS. BY H. JERMAIN MAUDE CREIGII- 

 TON, M. A., M. Sc., DR. So., Lecturer on Physical 

 Chemistry, Dalhousie University, Halifax, N. S. 



Read May 13fch, 1912. 



In an investigation 1 recently carried out by the author, it 

 was found that the degree in which the decomposition of 

 bromcamphor-carboxylic acid, in acetophenone solution, was 

 accelerated by various alkaloids and other organic bases, was 

 in most cases parallel to their affinity constants. As these 

 affinity constants are for water solutions, it seemed desirable 

 to determine whether the same order held when the con- 

 ductivity of the bases was measured in acetophenone solution. 

 Accordingly the following measurements were made. 



Measurements on the conductivity of a number of substances 

 in acetophenone have been made by Dutoit and Frederick 2 , 

 by the ordinary method of Kohlrausch. With the substances 

 under investigation, however, it was found that this method 

 was not sufficiently accurate, on account of the self-induction 

 and electrostatic capacity effects that arose with the large 

 resistances it was found necessary to employ. 



The method employed, therefore, was fthe condenser method 

 used by Nernst 3 and Miss Maltby*. By this method the resist- 

 ance of the electrolyte is determined through substitution in 

 one arm of a Wheatstone bridge arrangement, which consists 

 of four electrolytic resj^tances. Here the disturbance arising 

 from electrostatic influences is eliminated by means of two 

 condensers of variable capacity. The procedure is the same 

 as in the determination of the dielectric constant, wherein the 

 galvanic conductivity is compensated. 



1. Creighton, H. J. M. : Dissertation, Zurich. 1911. 



2. Dutoit, P. and Friderich L. : Bull. Soc, Chini., 10, 321, (1898). 

 a. Nernst, W, : Zeitschr. f. phys. ('hem., 14, 622, (189*). 



4. Maltby, M. E. : ibid., 18, 133, (1895). 



(154) 



