Qualitative Tests. 67 
IN THE WET WAY. 
1. Zn precipitates crystals of Pb. 
2. H:SO: precipitate white PbSOs, slightly soluble 
in excess, insoluble in alcohol, but soluble in ammon- 
ium acetate or citrate. 
3. HS or (NH:):S precipitates black PbS, soluble 
in HNO: with formation of PbSO.. 
4. K FeCcNe precipitates white Pb:FeCoNe. 
LITHIUM, Li. rafts ae 
WITH THE BLOWPIPE. a 
Flame.—Crimson, best obtained by gently heating 
near the wick. 
Interfering Elements. 
Sodium.—(a) Use a gentle flame and heat near 
the wick; (6) Fuse on platinum wire with baric chlor- 
ide in O. F. The flame will be first strong yellow, then 
green, and, lastly, crimson. 
Calcwum or Strontitwm.—As these elements do not 
color the flame in the presence of baric chloride, the 
above test will answer. 
Silicon.—Make into a paste with boracic-acid flux 
and water, and fuse in the blue flame. Just after the 
flux fuses the red flame will appear. 
IN THE WET WAY. 
1. Nitrophenic acid forms a yellow precipitate. 
2. Na:COs precipitates white LizCOs, slightly solu- 
ble in H:0. 
Confirm.—By blowpipe and spectroscope. 
MAGNESIUM, Mg. 
WITH THE BLOWPIPE. 
On Coal, with Soda.—Insoluble, and not absorbed 
by the coal. 
With Borax or 8. Ph.—Clear and colorless; can be 
flamed opaque-white. 
