240-245] EXAMINATION FOR ACID-RADICALS 



may also be present ' not as phosphate,' and of course will be found in 

 Table II. 



The four metals, Fe, Al, Ca, and Mg, should be returned 'as 

 phosphate ' or • not as phosphate,' exactly as they are found. 



TABLE IV.— PRELIMINARY EXAMINATION 

 FOR ACID-RADICALS 



In the following tests either the solid or a strong - solution may be 

 used : — 



TABLE V.— FURTHER EXAMINATION FOR ACID- 

 RADICALS 



244. Sulphate.— Boil a little of the original substance 

 with dilute HC1, filter, and add barium chloride solution ; 

 a white precipitate of BaS0 4 shows presence of a sulphate. 



245. Chloride.— Boil a portion of the original sub- 

 stance with dilute fiN0 3 , filter, and add AgN0 3 solution; 

 a white precipitate denotes presence of a chloride. 



