WORK OF C. M. STINE. 



53 



EFFECT OF CHANGE IN TEMPERATURE ON THE CONDUCTIVITIES OF SEPARATE SOLUTIONS 

 OF ELECTROLYTES AND ON MIXTURES OF THESE ELECTROLYTES. 



In this work we have repeatedly called attention to the fact that the conductivity 

 method furnishes us with only an approximate value of the dissociation of a salt. The 

 conductivity method of measuring dissociation is, however, the most general one avail- 

 able. In order to study the effect of change of temperature on the conductivities 

 of separate solutions of electrolytes, and upon mixtures of these electrolytes, it was 

 necessary to select a pair of salts which do not form double salts in solution, and which 

 have little or no hydrating power. Potassium chloride and ammonium chloride were used. 



The conductivities of single solutions of these salts and of their mixture were studied 

 at and 12 C. Comparisons having shown that our values agree very closely with 

 those obtained by Jones and West 1 and by Jones and Knight, 2 the values of Jones and 

 Knight, at 25 C, were used. The values of Jones and West, at 18 C, show a very 

 close agreement with those obtained experimentally by Kohlrausch at the same tem- 

 perature. The values for potassium chloride at 25 C. are taken from the results of 

 Kohlrausch. 



Since we are employing some of the values of Jones and West, Jones and Knight, 

 a nd Kohlrausch, at 25 C., we have tabulated a few values taken from these sources side 

 by side with our own (tables 39, 40, and 41). 



Table 39. Molecular Conductivities of Potassium Chloride and Ammonium Chloride. 



'Amer. Chem. Journ.. 34. 381 (1905). 



Ibid., 22, 125 (1899). 



