60 Qualitative Tests. 
CALCIUM, Ca. 
WITH THE BLOWPIPE. 
On Coal, with Soda.—Insoluble, and not absorbed 
by the coal. 
Fliame.—Yellowish red, improved by moistening 
with HCl. 
With Borax or S. Ph.—Clear and colorless, can be 
flamed opaque. 
IN THE WET WAY. 
1. H:SO« precipitates white CaSOs, soluble in a 
concentrated solution of (NH:«):SO:; distinction from 
Ba and Sr. . 
2. Alkaline arseniates precipitate CaHASOs, solu- 
ble in acids and NH-OH. Ba, Sr, and Mg give this pre- 
cipitate only in concentrated solutions. Ammonia salts 
must be absent. 
Confirm.—By plowpipe test. 
CARBONIC ACID, CO:. 
WITH THE BLOWPIPE. 
With Nitric Actd—Heat with water and then with 
dilute acid; CO: will be set free with effervescence. The 
escaping gas will render lime-water turbid. 
With Borax or S. Ph.—After the flux has been 
fused to a clear bead, the addition of a carbonate will 
cause effervescence during further fusion. 
IN THE WET WAY. 
1. Add HNO: to substance in a test-tube, and 
pass gas through a solution of lime-water. A white pre- 
cipitate CaCOs indicates CO:. 
CHLORINE, Cl. 
. WITH THE BLOWPIPE. 
With S. Ph., saturated with CuO.—Treated at tip 
of blue flame the bead will be surrounded by an intense 
azure-blue flame. 
