58 , Qualitative Tests. 
Cl, insoluble in an excess, but soluble in HCl and 
HNO:. 
3. SnCl: in the presence of NaOH or KOH pre- 
cipitates black BizO:. 
Confirm.—By blowpipe test. 
BROMINE, Br. 
WITH THE BLOWPIPE. 
With S. Ph., saturated with CuO.—Treated at tip 
of blue flame, the bead will be surrounded by greenish- 
blue flame. 
In Matrass with KHSOs—Brown, choking vapor. 
Interfering Elements. 
Silver.—The bromine melts in KHSO. and forms 
a blood-red globule, which cools yellow and becomes 
green in the sunlight. 
IN THE WET WAY. 
1. AgNO: precipitates yellow-white AgBr; changes 
to gray, soluble in KCN, slightly soluble in NH.OH, 
insoluble in HNOs. 
Separation of Cl, Br, and I.—Place a solution of 
the mixture in a test-tube with a little MnO: and water, 
add a drop of dilute H:SO: (one in ten). A brown 
color indicates I. Boil; violet vapors are given off. 
When these cease add 2cc. of H:SOs« and boil; brown 
vapors indicate Br. Boil until brown vapors cease and 
cool. When cold, add an equal volume of H:SO: and 
heat; green vapors indicate Cl. 
BORON, B. 
WITH THE BLOWPIPE. 
All borates intumesce and fuse to a bead. 
Flame.—Yellowish green. May be assisted by: (a) 
Moistening with H:SO:; (b) Mixing to paste with wa- 
ter, and boracic-acid flux (41% parts KHSOs, 1 part 
CaF:) ; (¢) By mixing to paste with H»SO. and NH«F. 
