KAHLENBERG — THEORY OF ELECTROLYTIC DISSOCIATION. 309 



In Table 1 are given the results of the conductivity measure- 

 ments at 0°, while in Table 2 the values obtained at 95° are pre- 

 sented. The numbers in each case indicate the equivalent con- 

 ductivity ( Av ) i n reciprocal ohms. The value of v indicates 

 the volume in liters in which a gram-equivalent is contained. 



An inspection of Tables 1 and 2 shows that in each case A ^ n " 

 creases with the dilution, which fact has also been observed by 

 other investigators 1 who have determined the conductivity of 

 these salts at 18° and 25°. The general manner in which the 

 equivalent conductivity increases with the dilution can best be 

 seen by charting the results in the form of curves. For the 

 salts here under consideration, it is true in general that A i n ~ 

 creases with increase of v in a similar manner in the cases of 

 salts that are chemically analogous. Thus if curves be charted 

 in which ordinates represent the volumes and abscissas the con- 

 ductivities, these curves will have a similar trend in the case of 

 the chlorides, the same will be true for the nitrates as a group, 

 and again for the sulphates as a group. At the same time the 

 curves for the nitrates are very similar to those of the chlorides, 

 but the sulphates have curves with more of a characteristic trend 

 of their own. It was deemed unnecessary to present here the 

 curves for all the salts in Tables 1 and 2. While they have all 

 been plotted, it will suffice for the present purpose to reproduce 

 curves of the various types of salts contained in the tables. As 

 euch typical salts NaCl, BaCl 2 , MgS0 4 and AgN0 3 have been 

 selected. Figures 1 and 2 show the trend of the curves at 0° 

 and at 95° respectively, the ordinates representing the cube 

 roots of the volumes and the abscissas the equivalent 

 conductivities. The shape of the curves of KC1 and KE is 

 similar to that of NaCl; the shape of the curves of ZnS0 4 , 

 MnS0 4 , CdS0 4 , NiS0 4 , CoS0 4 , FeS0 4 , and CuS0 4 closely 

 resembles that of MgS0 4 ; while KN0 3 and NaN0 3 have curves 

 much like that of AgN0 3 . The great similarity between the 

 curves of the chlorides and those of the nitrates has already been 

 alluded to. This similarity is clearly shown b y the curves rep- 



itCompare for instance the tables in Kohlrausch und Holborn,— Das Leitver- 

 mogen der Elektrolyte. 



