R, Napoli on Arseniuretted and Antimoniuretted Hydrogen. 191 
and the production of hydrochloric acid. The gold having been 
reduced, according to the formula just given, there remains 3HCi, 
and As, which would yield AsCls, and three equivalents of free 
hydrogen. The chlorid of arsenic when diluted with a large 
pel of water, is decomposed into arsenious and hydrochloric 
acids,” 
On consulting Berzelius and other works of authority, I found 
it stated on the one hand, that arseniuretted hydrogen is not 
altered by hydrochloric acid, and on the other, that arsenic is not 
affected by hydrochloric acid. These statements seemed to ren- 
der the proposed explanation inadmissible, but I have found by 
experiment that they are incorrect, and have arrived at the fol- 
lowing conclusions, first, arseninretted hydrogen is almost totally 
decomposed by pure concentrated hydrochloric acid, and secondly, 
arsenic itself is soluble in this acid : 
passed the arseniuretted hydrogen gas generated in Marsh’s 
apparatus, through concentrated hydrochloric acid in a Liebig’s 
a tube, and after continuing the process for an hour, chlorid 
0! 
epeatedly with cold and pure hydrochloric acid, and when its 
e 
tO contain chlorid of arsenic, and the liquid residuum in the 
pen contained a notable portion of the same chlorid; thus 
show i 
AuCls+As H;s=—Au+As Cls+H:. 
3Fez Cls+ As H3=6Fe Cl+As Cls+Hs. ; 
3Pt Cl +2As H3=Pt3+2AsCls+He. 
mony by Marsh’s apparatus. ‘The facts are these: arseniuretted 
and antimoniuretted hydrogen are both decomposed by pure and 
* The d ses ark with hydrochloric acid, i : 
ecomposit etted hydrogen with hydrochloric acid, is repre 
Sented by Asf Ty SHG ar Ch? aie cas is analogous to that of hydrid of cop- 
the same acid; in each case 2 metallic chlorid is formed, and the hydrogen 
compounds is set free. See Brodie’s remarks on the latter reaction, in the 
Gazette for 1853, p. 300.—(r. 8. 5.) 
