OF AQUEOUS SOLUTIONS.—BARNES. 131 
The method of obtaining the ionization coefficients by means 
of these equations is described in my former paper, the first stage 
in the process being the determination of the k’s and C’s. In 
the calculation of the conductivity, however, we save labour if 
instead of determining the ionization coefficients, we express 
the conductivity in terms of the h’s and C’s. 
For this purpose we have: 
k 
1 
a — 
1 >) 
Creer 
ie 
and a. =a 
7 Oe Ho 2 
Equation (A) thus becomes : 
1 (* iO ats aed 
p(y +¥s) , 
— Se 
\ 1 
Cc. Ce 
In my experiments p was found to be practically equal to 
unity, and the volumes of the solutions mixed were in all cases 
equal. Hence the above equation becomes : 
pS ( i Seas =) ee een vie) 
The work involved in finding & by means of equation (B), 
included the following:—(1) The preparation and analysis of 
series of simple solutions of both acids, and the preparation of 
the mixtures ; (2) observations on the specific gravity of the 
simple constituent solutions and their mixtures; (3) the measure- 
ment of the conductivity of series of simple solutions; (4) the 
measurement of the conductivity of mixtures of solutions; (5) 
the determination of the regional conductivity and regional 
concentration of the electrolytes in the mixtures; (6) the ecaleu- 
lation by the aid of these data, of the conductivity of the 
mixtures. 
The observations were carried out in the Physical and 
Chemical Laboratories of Dalhousie College, Halifax, during 
the spring and autumn of 1899. 
