Vol. I, No. 4.] Silver Diowide and Silver Peroxynitrate. 151 
[N.8.] 
Sample IT. =e im gms. gave 0°3138 gms, residual Ag: Ag = 
86° 88 per c 
The pesaiintaiss of silver in the second sample was also deter- 
mined by dissolving in warm dilute nitric acid, precipitating and 
weighing as silver chloride. 
0°3663 gms. gave 0° 4232 gms. pe rah Ag = 86°94 per cent. 
g,0, requires Ag=87'11 per 
The total oxygen in the danpibad te been determined by heat- 
ing in a combustion tube in a current of carbon dioxide, and aegil 
ing the liberated gas over strong aqueous potash. is gas w 
recognised as oxygen from its complete absorption by elietins 
syrtiallol solution. 
00842 gms. gave 8 bs cc oxygen at 27°C and 757°5 mm. pres- 
sure; 0 = 13:07 per ce 
Ag,0, requires O = ie 89 per c 
solution of silver diowide in hot ‘ilute sulphuric acid.—The 
Siecle. dissolves readily with the liberation of oxygen in accord- 
ance with the equation— 
ae = 2H,S0, = 2Ag.SO0, mf 2H,0 + bie 
ara 
ing the silver ste set with water. The flask was half-filled 
dilute sulphuric acid and boiled until all air be expelled. 
The flame was then withdrawn from the flask, the stop-cock on 
the delivery-tube closed, and a weighed quantity of pd dioxide 
introduced through the dropping-funnel. The flask w. 
heated, thedelivery-tube stop-cock reopened, and the eaghom pellet. 
ed over water. That this ocd hom i he i was shown by its 
solution in alkaline senlbe re ycr 
0°2745 gms. ape 7 7 ce siyged is 26° C and 7575 mm. pres- 
sure; O = 6°30 per 
1 atom of Sbyiiais 3 in Saves 6°45 per cent. 
The solution of silver dioxide in ia solution.— 
The oxide dissolves with the formation of a colorless solution and 
va SS. of nitrogen. The nitrogen liberated in this reaction 
in an 
ceibed by by Stile (Zeitschr. Anorg. Ohem., 24, p. 305). Ego ere 
laced i ae a flask fitted with delivery-tube and a dro 
J 
from the mie funnel. nitrogen liberated was collected 
over water. e @ end of the petal any maining in the 
apparatus w is terres out by water, The solu > was effected 
at the ordinary tempera 
0°4158 gms. apis 7 3 ce nitrogen at 28° C and 762°5 mm. pres- 
sure; N=1°92 perce 
0°4255 gms. pa 7 ‘4 ce nitrogen at 28° C and 762°5 mm, pres- 
sure; N=1°9] per cen 
