General Discussion of Results. 
437 
cral better than in the case of many of the other ketones; and 
on Plate VI is represented the conductivity of a number of salts 
in this solvent. The results platted are from the determina¬ 
tions of Carrara principally, those designated L from Laszczynski, 
and those with D are from Dutoit and Aston. 
It will be observed, that the molecular conductivity of the 
solutions of all the salts increases with the dilution except that 
of cadmium iodide, which remains virtually constant. Dutoit 
and Priderich found the same to be true for cadmium iodide in 
acetophenone. In the case of solutions of this salt in both 
methyl-ethyl ketone and methyl-propyl ketone, the conductivity 
decreases with the dilution and the same was found to be the 
case for stannous chloride in acetone. (See Table X.) 
In general the conductivity of solutions in ketones is much 
less than that of aqueous solutions, but there are a few notice¬ 
able exceptions. The molecular conductivity of Nal, NHJ, 
N(C 2 H 5 ) 4 I and of S(C 2 H 5 ) 3 I in acetone, according to Carrara, 
is greater in dilute solutions than the values assigned ^ for 
aqueous solutions. The value of fx for most of these salts is 
greater in acetone than in methyl alcohol. Carrara finds that 
HC1, LiCl and other hygroscopic substances that are highly 
dissociated in water, yield very low values for the molecular 
conductivity when dissolved in ketones. The value of fx for 
SCN.NH 4 , Cdl 2 , and C 7 H 5 0 3 . Na in methyl-propyl ketone as 
well as those for most salts in acetophenone are not of great 
magnitude. 
It will be seen from Plate VI that very few of the salts yield 
solutions in acetone that have limiting values for jx. There are 
two curves, for Nal and N(C 2 H 5 ) 4 I, that appear to indicate a 
decrease in the conductivity after certain dilutions are reached. 
The two curves, platted for KI, one from the determinations of 
Laszczynski and the other from those of Carrara, apparently in¬ 
tersect at about fx — 153. Laszczynski thinks the value of ^ 
lies between 160 and 170. Assuming the value of 160 for ^, ac¬ 
cording to Kohlrausch’s law of the additive property of the 
conductivity of aqueous solutions, Laszczynski calculates the 
factor k in the formula, /xco = k (u 4- v), where (u + v) is the con¬ 
ductivity at infinite dilution in water and k is a constant. The 
