Section 86. Hydrolysis of Ammonium Acetate. 



229 



86. HYDROLYSIS OF AMMONIUM ACETATE AND IONIZATION OF 



WATER AT 218 AND 306. 



In order to derive the degree of hydrolysis of ammonium acetate, the 

 specific-conductance values given in table 78 have been first corrected 

 to round temperatures by means of the temperature-coefficients given in 

 table 79, and the content by weight has been reduced in the usual way to 

 volume-concentration at the temperature of the measurement. These 

 conductance values were previously corrected for the conductance of the 

 impurities in the water; and a correction has now been applied for 

 that of the ionized water, or of the base or acid added, in those cases where 

 the correction exceeds 0.1 per cent. This correction was calculated from the 

 ionization-constants for these substances and the equivalent conductance 

 of the ions, as described in section 79. In no case did the correction 

 exceed 0.25 per cent. 



Table 89 contains the so-corrected data for the pure salt, and table 

 90 those for the salt with an excess of base or acid. In the latter table 

 are given for 218 and 306 in two additional columns (1) the specific 

 conductance (l ) which the pure salt has at the same concentration as 

 that (C) of the salt in the mixture, and (2) the ratio of the specific con- 

 ductance (l) of the salt in the mixture to this conductance l . The 

 specific conductance l is calculated from that given in table 89 for 

 nearly the same concentration under the assumption of proportionality 

 between conductance and concentration through the small interval 

 involved. 



Table 89. Specific conductance at round temperatures of 

 pure ammonium acetate solutions. 



