II. ON THE CALCULATION OF THE CONDUCTIVITY OF AQUEOUS 

 SOLUTIONS CONTAINING HYDROCHLORIC AND SULPHURIC 

 ACIDS. BY JAMES BARNES, B. A., Dalhousie College, 

 Halifax, N. S. 



(Communicated by Prof. J. G. MacOregor, on the 15th January, 1900.) 



The prediction of the conductivity of dilute aqueous solutions 

 containing two electrolytes, which have-one ion in common, has 

 been shown to be possible, according to the dissociation theory, 

 when the electrolytes are salts, or a salt and a diatomic acid 

 such as hydrochloric acid. 1 The experiments described in the 

 present paper were made, at Prof. MacGregor's suggestion, in 

 order to ascertain if it is possible to make the prediction in the 

 case of solutions formed by mixing hydrochloric and sulphuric 

 acid solutions. 



The attempt to calculate the conductivity of a complex solu- 

 tion containing sulphuric acid as one constituent is of special 

 interest because of the fact that it is supposed to have a mode of 

 ionization which varies with the concentration of the solution, 

 its molecules in dilute solutions dissociating into 2 H and SO 4 , 

 but in stronger solutions partly into H and H S0 4 . It is of 

 course impossible to calculate the conductivity of a complex 

 solution, one of the constituents of which has a mixed mode of 

 ionization. I have therefore assumed that the mode of ioniza- 

 tion in the moderately dilute solutions which I examined would 

 be the same as it is usually supposed to be at great dilution. 



The conductivity of a mixture of two solutions of electrolytes 

 1 and 2, with a common ion and definite modes of ionization 



1 MacGregor: Trans. N. S. Inst. Sci., 9, 101, 1895-6. 

 Mclntosh : Ibid., 9, 120, 1895-6. 

 Archibald : Ibid., 9, pp. 291, 307, 1897-8. 

 McKay : Ibid., 9, 321, 1897-8. 

 Barnes: Ibid., 10, 49, 1898-9. 



PROC. & TRANS. N. S. INST. Sci., VOL X. TRANS. I. 



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