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 k's and C's. 



For this purpose we have : 



" 



and a = 2 



Equation (A) thus becomes : 



, 1 Ik. n. v. 



k = 



Oj C 2 



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 : 



The work involved in finding k 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 calcu- 

 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. 



