Section 55. Summary of Equivalent Conductances. 

 Table 33. The conductivity data Continued. 



133 



53. SUMMARY OF THE EQUIVALENT-CONDUCTANCE VALUES. 



The separate conductance values given in table 33 were all corrected so 

 as to correspond to the uniform temperatures of 18, 100, 156, and 218 

 by means of temperature-coefficients obtained by plotting those values. 

 In the case of acetic acid, since the equivalent conductance varies rapidly 

 with the concentration, the preceding values were also corrected so as to 

 eliminate the small variations in concentration in the different experiments. 

 This was done with the help of the equation A 2 C = const., the substantial 

 validity of which will be shown subsequently. The so-corrected equiva- 

 lent conductances are summarized in table 34. The concentration is ex- 

 pressed in milli-equivalents (referred to oxygen as 16.00) per liter at 4. 

 In the columns headed "Initial" are given the equivalent conductances 

 obtained from the measurement at the temperature in question before go- 

 ing to the higher temperatures ; while in the columns headed "Final" are 

 given the equivalent conductances obtained after returning to the temper- 

 ature in question from a higher one. The means are based upon both the 

 initial and final values in cases where there was no systematic difference 

 between them ; otherwise upon the initial values alone : in which of these 

 ways the mean value was obtained in each separate case, is indicated in the 

 table by its position. From a comparison of the separate initial values at 

 any temperature and concentration the degree of agreement of the deter- 

 minations made at different times, and often with different solutions, may 

 be seen. A comparison of the initial and final values in the separate ex- 

 periments shows the contamination that resulted from the heating. 



