AMMONIA NITKATE WITH AMMONIA. 
371 
the mixture is made, a variegated mass is deposited, consisting apparently of plastic 
sulphur and a white salt of a thionic acid. 
Carbon tetrachloride is insoluble. 
Ammonia hydrobromide , potassium bromide , and potassium iodide behave like the 
corresponding chlorides. 
Lead iodide dissolves readily. Like that of the chloride, the solution may be mixed 
with a considerable quantity of water before precipitation takes place. The precipitate 
that falls is white. 
Mercuric iodide (red or yellow form) is turned perfectly white, and then rapidly dis- 
solves to a considerable extent. The addition of water at once causes a curdy white 
precipitate to fall, which contains almost all the mercury and iodine. This precipitate 
becomes pale yellow when washed, and then suddenly scarlet-red. The effect of the 
liquid upon the iodide is quite distinct from that of ammonia and ammonia nitrate 
dissolved in water. 
Fluorspar is insoluble. 
Potassium cyanide is nearly insoluble. 
Potassium ferrocy ankle is very nearly insoluble, but swells up to a bulky mass. 
Potassium ferricyanide at once imparts a strong yellow colour to the liquid, and is 
gradually converted into a pale yellow matter. Both the deposit and the liquid give 
the reactions of a ferricyanide. 
Sodium sulphide reacts with some energy and forms a bulky deposit (sodium nitrate). 
The liquid becomes charged with ammonia hydrosulphide and fumes strongly in the air. 
Zinc sulphide , cadmium sulphide , lead sulphide (native), mercuric sulphide (vermilion), 
and antimony sulphide (native) are insoluble and unchanged. (The least trace of zinc 
oxide in the zinc sulphide is dissolved out by the liquid.) 
Ferrous sulphide and manganous sulphide (prepared by twice strongly igniting the 
sulphates with sulphur and cooling them in hydrogen) colour the liquid pale yellow. 
The manganous sulphide is partly converted into a bulky substance soluble in water. 
The liquid gives a slight precipitate of sulphur when mixed with water (sulphur itself 
is insoluble in the liquid) ; it also yields a slight brownish-black precipitate with lead 
acetate and acetic acid. On the other hand, it gives, in the case of ferrous sulphide, a 
slight black precipitate with ammonia hydrosulphide, and, in the case of manganous 
sulphide, a slight reaction with nitric acid and lead dioxide. (I am not confident that 
the process employed in preparing these sulphides yields them quite free from oxygen.) 
Litharge is soluble. The solution gives a copious white precipitate with water. 
(Litharge is as efficient as lime or baryta in liberating ammonia from its salts.) 
Quick lime hisses as it comes in contact with the liquid, causes an effervescence of 
ammonia, and dissolves, with the production of a viscid deposit (ammoniated calcium 
nitrate 1). 
Magnesia is for the most part converted into a gelatinous matter, but a little of it 
dissolves. Its action probably resembles that of lime. 
