( 436 ) 



The quantities L will ,sliovv an almost complete additive character, 

 on acconnt of A^v Jind Kci l)cing independent of the concentralion 

 in the case of dilute solutions. For instance, in the same solvents 

 Aj and A, we must find: 



^KCl — ^NaCl = ^KNOs—^NaNO;, - 



And the same for other coml)inations. 



The above considerations inaj' be readily exteink^d lo the case of 

 7ion-huhary electrolytes such as CaCl^, ZnCI„, elc. In llir diirerent 

 equations the valencies v of the Ions will then also occur, because 

 the fundamental relation (4) then passes into the more general one: 



Zi = — 



+ + - - 



1^-, — l^y _ Ih — f*i 



+ ~ - 



VS Vf 



IV. The question in li(»w fai- and in what niannei- Ihe valuo of 

 A, given in ((i) or (fi^/), is still dejKMident on the concentrations of 

 the Ions, can oidv be answered, when we calcuhite the \alues of ƒ/ 



etc. with the aid of an e(juation of condition. If we accept tlic 

 equation of van dkr Waat.s as also a|)plying to li-<|nid-|)hascs, we 

 obtain for instance foi- the niolecides Hj, : 



H,, := - k,, T{lo.j 7-1) - RT (lo<i ^-^ - + [('/')«- ?'(»i/')"l + 



2£n 2 n , 



+ JiT ^—y^ b^,— -^ {u, a,,, -t- u^ a^,^ -f ...) + RT lor, ~. 



n^ stands here for the molecular number of the solvent. For h 

 and a we write : 



h — «1 h^ + n^ h^-^ . . , 



a = n^- a^^ + 2 ?>^ n^ r/^, -f 2 n^ n^ »i^^ + • • • 

 Let us now calculate the value of 



or, what amounts to the same, of 



If we indicate the solvent bv the index 1, the non-dissociated KCI, 

 dissolved therein, by 2, the two Ions by 3 and 4, we obtain for 

 fi' — fx' the expression 



- {k,-k,)T(io<i T-\) + [((<',)„-('',)o) -T{{^iX)-{nX)\ + 



2En 2 



V-b V 



