430 Application of Law of Mass Action to Strong Electrolytes, 



"l-"2 



Hence cr / TT , b\ 2 



, 7 = const, x ( VH ) from (1) 



(1 — a)V \ m) v J 



— const. ; 



"1 - n i 

 b\ 2 



= const. ; . . (4) 



(1-«)T 1+ — (l+|) 



writing c for 



w 



Partington's equation, 



„2 



= const., 



(i-a)(V+/>a) 



may be written 



= const. 



(l-«;V(i + />a/V) 



Now putting n 1 = n 2 in (4), we get 



= const. 



(i-.w(i+4) 



Thus, in order to derive Partington's equation, it is 

 sufficient to show that 



i+5-ci+f; 



or pa cc c, which is obviously true for dilute solutions 

 where a x c. 



Hence our conception of the nature of chemical force fits 

 in with Partington's equation. 



Conclusions. 



A quantitative theoretical interpretation has been given to 

 the equations of Rudolphi, van't Hoff, and Partington on the 

 fundamental assumption of the nature of the chemical forces 

 operative, described above. Complete ionization need not 

 be assumed. This assumption is therefore highly probable, 

 especially as it also represents quantitatively the departure 

 of gases from Boyle's law (van der Waals' equation). 

 The author has also shown (' Nature,' Jan. 27, 1921) that 



