COMPLEX SOLUTIONS.—ARCHIBALD. 39 
unexpected that I thought it well to repeat the observations, 
the result being substantiated by the repetition. 
Jt will be seen also that in both cases the coefficients reach 
constant values as concentration is diminished, in the ease of 
4 K, SO, from a concentration of 0004 on, in that of } Na,SO, 
from ‘0006 on. Assuming then that these values will hold for 
infinite dilution, the equivalent conductivities at infinite dilution 
for 0° C. may be determined from Kohlrausch’s values* for 18°C, 
mize 270x L0- and 1070 x10 for fK, SO, and. - Na, SO, 
respectively. They were found thus to have the values 800 x 
10-8 and 646x108 respectively, expressed in terms of the 
conductivity of mercury at 0°C. 
Determination of the Ionization coefficients of sinvple 
solutions. 
Both for the purpose of finding how closely the lowering of 
the freezing point could be calculated for simple solutions and 
for the purpose of determining the ionization coefficients of the 
electrolytes in the mixtures, it was necessary to know the 
ionization coefficients of a sufficiently extended series of simple 
solutions of the two electrolytes. The following table contains 
the observations of conductivity made for this purpose, together 
with the values of the ionization coefficients calculated on the 
assumption that for simple solutions they are equal to the ratios 
of the equivalent conductivity to the equivalent conductivity at 
at infinite dilution. The table gives also the ionization coeffi- 
cients at 18°C. obtained from the conductivity observations 
ef former papers. + These quantities are not needed for 
the present purpose. But the knowledge of the ionization 
coefficients at 0° enables us to determine how in the case of 
the electrolytes under consideration the state of ionization 
ir simple solutions varies with the temperature. Concen- 
tions and conductivities are expressed in terms of the same units 
as in Table I. 
*Wied. Ann., 50, 406, (1893). 
t Trans. N. S. Inst. Sci., 9, 291 and 307, (1897-8.) 
