OF AQUEOUS SOLUTIONS.—BARNES. 1a 
curve of an electrolyte exhibits only slight curvature and can 
therefore be drawn with fair accuracy from a small number of 
observations. 
The above equations may be expressed in terms of specific 
conductivity and concentration as follows. Since 
CEE A Tega (8) 
Me VAS [ee 
a ; 
and —2— —#, , : . . (9) 
Ni 2 Ua2 
where k, and /, are the specitic conductivities of the electrolytes 
in the regions which they respectively occupy in the mixture, 
and the #,’s the specitie molecular conductivities at infinite dilu- 
tion for each electrolyte, equation (4) becomes : 
ie ky 
(bei | Wap 
(i 
or, eee : ; GLO) 
Boe 7 
From equation (5) we obtain : 
oe co ot eeanems (lal) 
Jy re 
where C, and C, are the regional concentrations. Equations (6) 
and (7) are based on the fact that at a definite temperature the 
conductivity is a function of the concentration alone. They 
therefore take the following forms: 
nn C7 ae P 4 : (12) 
and [P= (Oa ies ; ; : (13) 
There are thus four equations (10—13) for the determination of 
the four unknown quantities: hy, h,, C,, and C,. 
These equations can be solved graphically. Equation (12) is 
employed by drawing a curve having as abscissee the values of 
the specific conductivities and corresponding values of the con- 
centrations as ordinates. Before equation (13) is used the values 
