Section 83. Summary of Equivalent Conductances. 



221 



of the ammonium hydroxide to the ammonium chloride present, the excess 

 of base having been added in the experiments carried to the higher 

 temperature in order to reduce the hydrolysis nearly to zero. The next 

 three columns give the equivalent conductance at 18 before and after 

 heating to 218 or 306, and that at 218 or 306. The increase of con- 

 ductance at 18 shows that a slight contamination occurred. This has 

 been corrected for in the last column by diminishing the conductance at 

 218 or 306 by one-half of the percentage increase at 18. This correc- 

 tion is about 0.1 per cent, except in Nos. 1.2b and 1.8 where it is 0.5 per 

 cent; the results of these experiments are therefore given a weight of 

 one-half. 



In table 81 are given in a similar manner the results with sodium acetate. 



Table 81. Equivalent conductance of sodium acetate at 

 round temperatures. 



Experi- 

 ment No. 



1.4 

 1.3 

 1.1 

 1.2 



Milli-equivalents of Ratio of 



salt per liter. HC2H3O2 



to NaC2H302. 



18 



42.52 

 14.13 

 2.844 

 2.806 



306 



29.95 

 9.92 

 1.998 

 1.9685 



1.07 

 1.56 

 2.62 

 4.11 



Equivalent conductance. 



lSinitial. 18final. 306. 



66.85 66.8 

 71.3 i 71.1 

 75.3 75.55 

 75.9 77.1 



613 

 702. 

 800 

 803 



It will be seen that the conductances at 18 of the first four ammonium 

 chloride solutions containing no excess of ammonia are uniformly about 

 0.3 per cent lower than those of the solutions containing ammonia. The 



