Qualitative Tests. 71 
IN THE WET WAY. 
1. Alkaline carbonates precipitate green basic car- 
bonate 2NiCO:, 3Ni(OH):, soluble in (NH:)2COs or, in 
excess of reagent, with blue or greenish-blue color. Again 
precipitated by KOH or NaOH as pale-green Ni(OH):. 
2. NH:OH in excess gives blue color. 
8. KCN precipitates pale-green NiC:N2, soluble.t in 
excess. Upon boiling with NaClO, black Ni(OH)s is 
precipitated. Distinction from Co, which gives a dirty- 
white precipitate with KCN, soluble in excess, but no 
precipitate being formed on boiling with NaClO. 
NITRIC ACID, HNOs. 
WITH THE BLOWPIPE. 
In Matrass with KHSOs, or in Closed Tube with 
Litharge.—Brown fumes with characteristic odor. The 
fumes will turn ferrous-sulphate paper brown. 
IN THE WET WAY. 
1. To the solution, in a test-tube, add a saturated 
solution of ferrous sulphate, and then concentrated sul- 
phuric acid (free from HNOs; a brown ring between 
the FeSO: and H:SO: indicates HNOs). 
PHOSPHORUS, P. 
WITH THE BLOWPIPE. 
Flame.—Greenish blue, momentary. Improved by 
cone. H:SO.. 
In Closed Tube with Dry Soda and Magnesium.— 
The soda and substance are mixed in equal parts and 
dried, and made to cover the magnesium. Upon strong- 
ly heating there will be a vivid incandescence, and the 
resulting mass, crushed and moistened, will yield the 
odor of phosphuretted hydrogen. 
IN THE WET WAY. 
Orthophosphates—1. Magnesia mixture precipi- 
tates white MgNHsPO.. 
