TPhReeNSsAC TLONS 
OF THE 
ova Scotian Enstitute of Science. 
SESSION OF 1897-98. 
I.—ON THE CALCULATION OF THE CONDUCTIVITY OF AQUEOUS 
SOLUTIONS CONTAINING POTASSIUM AND SoDIUM SUL- 
PHATES. — By E. H. Arcurtpanp, B. Sc., Dalhousie 
College, Halifax, N. S. 
(Read November 15th, 1897.) 
According to the dissociation theory of electrolysis, held by 
Arrhenius and others, the conductivity of a mixture of two 
solutions of electrolytes, 1 and 2, which have one ion in common, 
and which contain n, and n, gramme-equivalents per unit of 
volume, is given by the expression: 
eae SN 
p(v,+V,) 
where v, and v, are the volumes of the two solutions mixed, p 
(4 M4 Hoy Vit Mg Me Hoe va), 
the ratio of the volume of the mixture to the sum of the volumes 
of the constituent solutions, “,,, and #,, the molecular conducti- 
vities, at infinite dilution, of the respective electrolytes under the 
conditions in which they exist in the mixture, and «,, @,, the 
ionization coefficients of the respective electrolytes in the 
mixture. 
The value of p in the above formula may be determined by 
density measurements, before and after mixing; ,, and ny. 
which for sufficiently dilute mixtures, may be considered to have 
(291) 
