H. Wurtz’ Contributions to Analytical Chemistry. 83 
are all readily converted by contact with water alone, either into 
the corresponding oxyds, or into combinations of chlorohydric 
acid therewith which are very unstable and pion tg by evap- 
oration alone. Osmium also, according to ,* is converted 
by nitric acid into osmic acid, and even by aqua regia, no chlorid 
the chlorid nitric acid and a little chameleon mineral, and evap- 
orating to dryness, the residue still contained chlorine, and after 
a@ repetition of the same treatment, a trace was still found, With 
chlorate of potash, however, a successful result was obtain 
the residue contained no trace of chlorine.| 
Separation of —— fos the alkalies, 
orid of sodium, by su eintarsng pure coeais of soda 
na wie chlorohydri¢ acid, recrystallizing and fusing the pro- 
duc 
: Ciloridl of potassium, by recrystallizing some chlorate of pot- 
ash, washing with cold water, drying, and fusing carefully and 
for ra long time ina platinum erucible.{ The chlorid thus ob- 
tained still retained, however, a trace of chlorate or perchlo- 
rate, for when dissolved in chlorohydric acid and boiled with a 
little indigo solution, bleaching took place. To test its purity 
therefore 05809 gram was dissolved in water and evaporated to 
dryness with an excess of pure ee acid. The residue 
Ibid, i, 299. } Ibid i, 307. e Sar Handbuch. ii, 476 and 477. 
idue, a peg or sone color ieagect 
: small quantities at a time, waiting stil each preceding portion is entirely 
posed, as position is very violent and accompanied by great frothing, — 
