158 



CONDUCTIVITY AND VISCOSITY IN MIXED SOLVENTS. 



workers have found that, in the case of mixtures of the alcohols and water, 

 the viscosity of the mixture is much greater than would be expected from the 

 law of averages. 



Jones and Carroll 1 have calculated the various fluidities of mixtures of 

 methyl and ethyl alcohols and water, for the temperatures 0, 10, 20, and 

 30, from the results of Pagliani and Battelli 1 and of Traube, 1 and have plotted 

 the fluidity curves. Their curves were similar to those which we obtained. 



25$ 50$ 75# 100f 



Percentage of Acetone 

 FIG. 77. N/10 LITHIUM BROMIDE IN ACETONE MIXTURES AT 25. 



Tables 74 and 75 (figs. 75, 76, and 77) show that there is a minimum of 

 fluidity for the solvents only in the case of acetone and water. This fact was 

 pointed out by Jones and Bingham. Lithium bromide, in a mixture of ace- 

 tone and water, shows a similar minimum. Jones and Bingham also found 

 that in the mixtures of acetone with methyl alcohol somewhat larger values 

 were obtained than would be expected from the fluidities of the pure solvents. 

 This effect is not quite so apparent in the case of acetone and ethyl alcohol. 

 We obtained similar results in the case of lithium bromide in these solvents. 

 It is to be especially noticed that the viscosity curves in all cases, for mixtures 

 of acetone with the alcohols, show a marked sagging. 



1 Loc. cit. 



