ON A DIAGRAM OF FREEZING-POINT DEPRESSIONS, ETC. 



General Conclusions. 



Although the observations on which the above discussion is 

 based are defective, and the particular conclusions drawn are 

 consequently tentative, I think it may be held with some con- 

 fidence (1) that the curves of equivalent depression against ioni- 

 zation coefficient, have positions, forms, and slopes, such as they 

 might be expected to have, on reasonable assumptions as to 

 mode of ionization and constitution in solution, according to the 

 Van 't Hoff-Arrhenius theory of the depression of the freezing- 

 point in solutions of electrolytes, (2) that for all the electrotytes 

 examined, they are consistent with the depression constant 

 having a common value of about 1.85, and that in the case of the 



O 



electrolyte for which we have the best data, the curve is not 

 consistent with a greater limit of error in this value than about 

 .01, unless improbable assumptions are made with respect to the 

 constitution of the electrolyte in solution, and (3) that the dia- 

 gram enables us to reach in some cases, conclusions of considerable 

 probability with respect to the constitution of the electrolyte in 

 solution, and its mode of ionization. 



