Degree of some Electrolytes at 0°. 



119 



found for 0°, and as abscissae the values of V, we find that the 

 curves are almost coincident, while the one representing the 

 values obtained by Wilderinann from the lowering of the 

 freezing-point runs considerably lower, as the diagram 

 indicates. 



The values of X^ for 0° in the following table is calculated 

 by means of the temperature-coefficient of the most dilute of 

 the investigated solutions from the values of X,« given by 

 Ostwald for 25°. 



For di- and trichloracetic acids the following values were 

 found : — 



Dichloracetic Acid, 



i^ =0-0148. 



A, (11. 



32 



64 



128 



256 



512 



GO 



X 



for 0°. 



174 



1942 



207-9 



216-1 



221-9 



227*0 



X» 



A* 



for C 



76-6 

 85-5 

 915 

 952 

 977 

 100 



X for 25°. 



Wood. Ostwald 



252-3 

 317-4 

 3518 



2531 

 290 7 

 317 5 

 3370 

 3522 

 3610 



X» 



for 25°. 



70-2 

 80-5 

 88-0 

 934 

 97-6 

 1000 



Dissoeiatiou- 

 degree by 

 lowering of 

 freezing- 

 point. 



740 

 84-0 



Trichloracetic Acid, 



ldX 

 XdT 



0-0149. 



32 



64 



128 



256 



512 



00 



2060 



91-7 



3240 



3230 



90-1 



211-9 



91-3 



333-5 



332-8 



930 



216-6 



96-4 



341-5 



341-0 



95-3 



219-7 



977 



3481 



3480 



97-0 



221-9 



93-7 



353 



353-7 



98 8 



2247 



1000 



— 



358-0 



100-0 



88-1 

 940 



For control, the conductivity of the two acids at infinite 

 dilution at 0° was calculated from the values obtained for 

 j-L" normal solutions of their potassium snlts, potassium 

 chloride, and hydrochloric acid, according to the Kohlrausch 

 law. The following are the values found, which agree very 

 well with those in the table : — 



Dichloracetic acid 

 Trichloracetic acid 



Xco=228. 

 Xoo =225-2 



The dissociation-degree of the two acids is apparently 



