Section 19. Ionization Values. 



53 



used up to 100 are those of Thorpe and Rodger and for 128 and 156 the 

 values were interpolated from the data of de Haas. 



It is evident that there is a parallelism in the change in the two prop- 

 erties, but that at all temperatures the viscosity is changing considerably 

 more rapidly than the equivalent conductance. 



Finally, attention may be called to the fact that at the highest concen- 

 tration (80 milli-normal) the equivalent conductance of potassium chlo- 

 ride passes through a maximum value between 281 and 306, owing 

 to the increase in the equivalent conductance of the ions being compen- 

 sated by decrease in ionization ; and that of sodium chloride nearly attains 

 such a maximum. 



19. IONIZATION VALUES AND THEIR CHANGE WITH THE 

 CONCENTRATION AND TEMPERATURE. 



The percentage ionization of the two salts at the different concentra- 

 tions and temperatures, obtained by dividing the values given in table 

 9 of the conductance at any concentration by that extrapolated for zero 

 concentration, is shown in table 12. 



The change of ionization with the concentration at any definite tem- 

 perature does not require special discussion since the functional rela- 

 tion must be of a corresponding form to that between equivalent con- 

 ductance and concentration, which was discussed in section 17. It will 



