103 



Cone. Moln. per Litre. Per Cent. Hydrolysis. 

 0.1 95.39 



0.05 95.44 



0.02 95.65 



That is, in a solution of NaoNH^PO^, at the above concentration, only 

 5 per cent, of the ammonia is chemically combined. When the hydrolysis 

 is large the method is accurate, and even v.hen it is small the results are 

 good, as shown by the following values for the salt NaNH^HPOi : 



Cone. Mols. per Litre. Per Cent. Hydrolysis. 



0.1 2.98 



2.92 

 2.98 



0.05 .3.02 



.3.13 

 3.02 

 2.90 



Mean, 3.0 



These values are corrected for the ionization of the ammonia at the 

 different concentrations. 



