282 
DR. KANE ON THE CHEMICAL HISTORY 
and the residual palladium was ascertained to be from 35*56 to 35*27 in 100 of the 
crystals. These numbers indicate the formula Pd Cl + N H 4 .C1 -j- H O, which gives 
Pd 
= 53*3 
35*28 
Cl 2 
= 70*8 
46*86 
nh 4 
= 18*0 
11*91 
= 90 
5*95 
151*1 
100*00 
If the salt were anhydrous it should yield 37'51 per cent, of metal. 
It is only in consequence of its differing from the potassium salt that I deem this 
body worthy of notice here. 
Of the Oxychloride of Palladium. 
When a solution of chloride of palladium is partially precipitated by means of a 
solution of potash or of soda, care being taken that the metallic chloride shall still 
be present in considerable excess, a dark brown powder is obtained, which is a defi- 
nite oxychloride of palladium. 
When dried in a stove at a temperature of 150°, its properties are as follows : — if it 
be heated, it gives off water, and at a full red heat chlorine and oxygen, leaving be- 
hind a mixture of subchloride, suboxide, and metal. It dissolves in dilute acids, 
giving a mixture of protochloride and an ordinary palladium salt of the acid used. 
Its analysis was conducted as follows : — 
A. 40*639 grains fused with carbonate of soda and the saline mass dissolved in 
water left 28*508 grains of palladium, purely metallic, being equal to 69*80 per cent. 
The solution acidulated by nitric acid and precipitated by nitrate of silver, gave 
18*103 grains of chloride of silver, or 44*55 per cent., containing 10*99 of chlorine. 
B. 67‘543 grains of another specimen were heated over a spirit-lamp as long as 
any watery vapour came off, but not so high as to expel any traces of chlorine or 
oxygen. The dry mass which remained weighed 59*977 grains, being 88*62 per cent. 
The loss of water had thus been 11*38 per cent. 
This dry residue was then vividly ignited and a lump of carbonate of ammonia in- 
troduced to favour the separation of the chlorine. The metallic palladium which 
remained weighed 47*442 grains, or 70*25 per cent. 
These results lead to the formula Pd Cl + 3 Pd O + 4 H O, which gives, — 
4 Pd = 
Theory. 
Experiment A. 
Experiment B. 
213*2 
69*10 
69*80 
70*25 
3 0 = 
24*0 
777 
Cl = 
35*4 
11*47 
10*99 
4 110 = 
36*0 
11*66 
11*38 
308*6 
100*00 
It is therefore quite analogous to the ordinary oxychloride of copper. 
