276 



Conductivity of Aqueous Solutions. Part VIII. 



and Chso 4 /C by the two equations just referred to.* All the final values 

 are brought together in table 119. The symbols represent the concentra- 

 tions in milli-formula-weights per liter of the substance indicated by the 

 subscripts, except that in calculating the ionization-constants formula- 

 weights instead of milli-formula-weights were used. 



An examination of the values of 100 CsoJC in tables 118 and 119 shows 

 that the secondary ionization of the sulphuric acid into hydrogen-ion and 

 sulphate-ion at 18 is fairly complete in 0.002 molal solution and that it is 

 large, though far from complete, in 0.05 molal solution; also that with 

 rising temperature this secondary ionization decreases very fast and 

 becomes scarcely appreciable in the stronger solutions at 156. Although 

 the values of the ionization-constant given in the last column of the tables 

 vary considerably with the concentration probably owing mainly to the 

 fact that the ionization is so large and partly, especially at the higher tem- 

 peratures, to experimental errors yet the effect of temperature upon 



*In these calculations the following data, obtained from the three tables mentioned 

 just above, were used, in addition to those given in the foot-note to table 117 and 

 that table itself: 



