OTHER PROPERTIES OF ELECTROLYTIC SOLUTIONS 309 



TABLE CXXVIII. 



CONDUCTANCE OF THE CHLORIDE ION AT 18 AS DERIVED FROM THE CON- 

 DUCTANCE AND THE TRANSFERENCE NUMBERS OF DIFFERENT 

 ELECTROLYTES AT 0.01 N AND 18. 



A n T C1 T cl Arr 



HC1 369.3 1.0005 0.167 61.67 



CsCl 125.07 0.9997 0.495 61.89 



KC1 122.37 0.9996 0.504 61.68 



NaCl 101.88 1.0009 0.604 61.55 



LiCl' 91.97 1.0016 0.668 61.48 



Here T T QJ is the transference number of the chloride ion and T^Ari - 7 



is the conductance of the chloride ion corrected for viscosity. From an 

 inspection of this table, it is evident that the conductance of the chloride 

 ion, as derived from the transference numbers and conductances of dif- 

 ferent chlorides, is the same. The ion conductances given in the last 

 column have been corrected for the viscosity according to Equation 41, 

 assuming for the exponent p the value 0.7. This viscosity correction is 

 uncertain, but in view of the fact that the viscosity effect in all these 

 solutions is scarcely in excess of 0.1 per cent it is evident that the vis- 

 cosity correction can have only a minor influence. While the conduc- 

 tance of the chloride ion in the different chlorides is very nearly the 

 same, it does not appear to be identical. In lithium chloride, for ex- 

 ample, the conductance is approximately 0.7 per cent lower than it is 

 in caesium chloride, and from caesium chloride to lithium chloride the 

 conductances vary in the order: caesium, potassium, sodium, lithium. 

 If the differences were purely accidental, we should not expect any such 

 regularity in the order of the conductance values. Maclnnes has also 

 made a similar comparison at higher concentrations up to and including 

 1.0 N. Throughout he obtains excellent agreement among the conduc- 

 tance values of the chloride ion in different chlorides. It should be 

 noted, however, that, at the higher concentrations, the viscosity effects 

 are considerable, and the ion conductances in consequence are propor- 

 tionately in doubt. 



Maclnnes is inclined to believe that it is generally true that at a 

 given concentration the conductance due to a given ion is independent 

 of the nature of other ions present in the solution. This generalization, 

 however, does not appear to be wholly justified. For example, assuming 

 the transference values given by Noyes and Falk, we obtain for the 

 conductance of the nitrate ion at 0.2 N in solutions of KN0 3 , AgN0 3 



