MICROCHEMICAL REACTIONS OF THE COMMON ACIDS 371 



Ferricyanide. Yellowish-red, or brownish-red. 



Iodide. So faintly yellow as to appear white, 



lodate. So faintly yellow as to appear white. 



Manganate, permanganate. Violet. 



Nitrite. Colorless unless in masses, then 



greenish. 



Phosphate. Yellow. 



Sulphide. Black or brown. 



I. C.i. The White or Colorless Precipitate Dissolves. 



~ , Appearance of the precipitate before the 



nitric acid is applied. 



Acetates. Crystalline; prisms and plates. 



Borates. Granular. 



Carbonates. Amorphous or granular. 



Cyanates. Dense amorphous. 



lodates. Granular or crystalline in tiny stars or fine 



needles. Difficultly soluble in HNO 3 . 



Nitrites. Long slender needles. 



Oxalates. Granular or crystalline; short stout prisms, 



rhombs or hexagons. 



Sulphates. Prisms, rhombs and crystallites. 



Sulphites. Granular or crystalline; prisms. 



Tartrates. Amorphous becoming crystalline; crystallites 



and prisms. 



Thiosulphates. Dense amorphous, or granular, white changing 

 to yellow, red-brown or dark brown due to 

 formation of silver sulphide. When much 

 sulphur separates the precipitate may ap- 

 pear to be insoluble in HN0 3 . 



I. C. 2. The Colorless Silver Salt is Insoluble in Nitric Acid. 



Chloride. 

 Bromide. 

 Iodide. 



Hypochlorite. 

 Ferrocyanide. 1 

 Sulphocyanate. 



1 Turns yellowish red or brown when drop of nitric acid is applied. 



