SULFATE OF AMMONIA 



Sulfate of ammonia is made by distilling 

 the ammonia from the gas liquor into sulfuric 

 acid. The first problem is to find out, ap- 

 proximately, how much gas liquor should be 

 used to neutralize a convenient amount, say 

 15 cc, of chamber sulfuric acid. 



Calculations. — Read the specific gravity 

 spindle floating in the sulfuric acid and cal- 

 culate, from the table on page 4, the amount 

 of actual sulfuric acid in the 15 cc. to be used. 

 From the equation, 



2NH3 + H2SO4 = (NH4)2S04, 



find out how many grams of ammonia are 

 necessary to unite with this amount of acid. 



Ascertain the strength of the gas liquor 

 and compute the volum necessary to con- 

 tain the desired amount of ammonia. 



For example: If 30 grams of ammonia 

 (NII3) are desired and the gas liquor is 8 per 



cent ammonia, there will be — -— = 125 grams 



0.08 



required. The density of gas liquor being 



nearly the same as water, 125 cc. in place 



of 125 grams may be considerd the correct 



amount. 



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