Section 64. The Water Correction. 



161 



Table 48. Conductance-capacity of the U-shaped vessel. 



64. THE WATER CORRECTION. 



Since impurities in the water tend to decrease the conductance of strong 

 bases, no correction for the conductance of the water was applied to the 

 results with sodium hydroxide. Nor was any correction applied to those 

 with the 1/40 normal ammonium acetate solution, since the correction 

 was less than 0.05 per cent. In the other cases (the ammonium hydroxide 

 and chloride and 1/100 normal ammonium acetate solutions) a correction 

 was applied, which was determined by heating pure water in the bomb 

 (after it had been freed as far as possible from absorbed substance by a 

 previous heating at 156 with water), making the time of heating at each 

 temperature the same as in the usual experiments. The results obtained 

 are shown in table 49. 



Table 49. Actual conductance (X10 6 ) of zvater in the bomb. 



These corrections were subtracted from the observed conductance of the 

 solutions in the cases specified above. They form roughly the following 

 fraction of that conductance in the different cases : 



