10 CONDUCTIVITY AND VISCOSITY IN MIXED SOLVENTS. 



ETHER. 



Practically the only work on ethereal solutions is that of Cattaneo 1 and 

 Kablukoff. 2 Cattaneo measured the conductivity of ethereal solutions of 

 cadmium iodide, cadmium bromide, ferrous and ferric chlorides, aluminium 

 mercurous and stannous chlorides, salicylic and hydrochloric acids. He 

 found that ethereal solutions have a negative temperature coefficient of 

 conductivity, and that the molecular conductivity of hydrochloric acid in 

 ether decreased with increase in dilution. This is analogous to the results of 

 Kablukoff in the case of isoamyl alcohol. Indeed, Kablukoff found also 

 that the conductivity of hydrochloric acid decreased with the dilution. 



KETONES. 



The conductivity of a number of salts of the alkalies in acetone were 

 published by Cattaneo 3 several years ago. About the same time a paper 

 appeared from St. v. Lasczynski 4 on the conductivity of some salts in 

 acetone. Among these were included lithium and mercuric chlorides, 

 potassium iodide, silver nitrate, and potassium, sodium, and ammonium 

 sulphocyanates. The conductivity of solutions in acetone has also been 

 measured by Carrara. 5 



Kahlenberg and Lincoln 6 measured the conductivity of solutions of ferric, 

 cupric, and stannous chlorides, and antimony trichloride in acetone; and 

 Dutoit and Aston, 7 as well as Dutoit and Friderich, 8 studied a number of 

 solutions in acetone and other ketones. Dutoit and Aston pointed out, as 

 has been mentioned, that those solvents which dissociate to the greatest 

 extent are polymerized, as shown by the surface-tension method of Ramsay 

 and Shields. 9 



In addition to acetone they worked with methylethyl ketone and methyl- 

 propyl ketone. In the former solvents they used mercuric chloride, cadmium 

 iodide, ammonium sulphocyanate, and sodium salicylate; in the latter, 

 cadmium iodide, ammonium sulphocyanate, and sodium salicylate. They 

 found that in the methylethyl ketone the conductivities were larger than in 

 the methylpropyl ketone, but that the conductivity in acetone was the 

 greatest of the three. Dutoit and Aston conclude from their work, to- 

 gether with that of Kablukoff, 10 that there is a general relation between the 

 polymerization of the molecules of a solvent and its dissociating power. 



1 Atti R. Ace. del le Scienze, Torino, 28, 5 Gazz. Chim. Ital., 27, I, 207 (1897). 



329. Rend. R. Accad. del Lincei, [5] 8 Journ. Phys. Chem., 3, 27 (1899). 



2, 295. 7 Compt. rend., 125, 240 (1897). 



2 Ztschr. phys. Chem., 4, 431 (1889). 8 Bull. Soc. Chim., [3] 19, 321 (1897). 



8 Rend. R. Accad. dei Lincei, [51 4, 2 8 Ztschr. phys. Chem., 12, 423 (1893) 



sem., 63-75. I0 Ibid., 19, 251 (1896). 

 4 Ztschr. Elektrochem., 2, 55 (1895). 



