68 IONIZATION OF COMPLEX 
mining concentration when state of ionization is given. And I 
take this opportunity also, of comparing it with two other 
methods which have recently been employed, of determining the 
ionization coefficients for solutions of the same degree of com- 
plexity. 
Determination of the ionization, concentrations being given. 
It was shown in the papers cited above, that if the two 
electrolytes in a complex solution may be supposed to occupy 
distinct portions or regions of the solution, if the law of kinetic 
equilibrium may be supposed to be applicable both to these 
regions singly and to the whole volume of the solution, and if 
the concentration of ions of each electrolyte in its own region 
may be supposed to depend at a given temperature on the dilu- 
tion of the electrolyte in its region, merely, and to depend on 
dilution in the same way as in the case of a simple solution of 
the same electrolyte, the relations between the ionization coeffi- 
cients, the amounts of the electrolytes present, and the dilutions 
which they must be supposed to have in their tictitious regions, 
may be expressed by four equations. If we denote the electro- 
lytes by 1 and 2, the concentrations (in gramme-equivalents 
per litre) of the solutien with respect to them by N, and N, 
respectively, their ionization coefficients by a, and a, and their 
regional dilutions (in litres per gramme-equivalent) by V , and 
V, respectively, these equations take the form : 
ar ae Le A ; = 5 rs (1) 
Von Lowe 
NAW SENG Vg Sls : . 
7 f Cee Oe eee C) 
= Je Con oe 
the functions f/, and f, being determinable by means of suffi- 
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ciently extended observations of the conductivity of simple 
solutions of 1 and 2 respectively. 
