M. C. Lea on the Platinum Metals, 255 
Ru,Cl,—bright yellow liquid. » | 
RuCl,—the same, but more on a wine color, 
_ir,Cl,. When toa slightly acid solution of sesquichlorid of 
iridium, enough of the solution in question is added to make the 
liquid strongly alkaline, a green coloration is produced at once, 
which by boiling becomes olive. ' 
But if the iridium solution be first rendered alkaline with am- 
monia, the addition of the above reagent gives a bright yellow 
coloration, which by boiling becomes deep wine red. 
(IX.) 
REACTIONS WITH SCHLIPPE’S SALT. 
A solution of Schlippe’s salt mixed with an equal bulk of 
ammonia, and added to the solutions of the Pt. metals, gave the 
following reactions: 
Ru, Cl, by boiling, a blackish precipitate. 
RaCl,. When the solution containing the bichlorid of ruthe- 
nium is boiled, and a single drop of solution of Schlippe’s 
salt added, a yellow transparent liquid is obtained. A larger 
addition gives an abundant light brick colored precipitate. 
When this larger quantity of solution of Schlippe’s salt is 
added, a slight warming is sufficient to throw down the pre- 
tate. 
Ir, Gl, A similar precipitate is obtained, but only after 
some minutes’ boiling. ~ : 
IrCl,, is instantly decolorized by solution of Schlippe’s salt 
ith ammonia, and when boiled remains clear for a few 
minutes, then lets fall an abundant brick-brown precipitate, 
In this it is distinguished from RuCl,, which lets fall the 
precipitate by a slight warming. 
PdCl. As ammonia precipitates palladium at once, the follow- 
ing course was adopted. monia was in a test- 
tube, and a little palladium solution added. Heat was ap- 
plied till the precipitate, which at first formed, was redis- 
solved. An addition of Schlippe’s salt then produced an 
instantaneous and abundant brown recipitate. 
PtCl, treated with Schlippe’s salt (without ammonia) gave an 
immediate dark brick-brown precipitate in the cold. 
K ;- Osmite of potash, dissolved in dilute caustic potash, 
gives with the aid of heat an immediate black precipitate 
with Schlippe’s salt. 
_, The following substances gave no characteristic reactions with 
_ the platinum metals: fulminurate of ammonia, nitroprusside of 
m, picrate of ammonia, nitrosalycylate of potash, purpurate 
ammonia, benzoic acid, chloranilamate of ammonia. 
