96 Mr. Brett on the Solubility of certain Metallic Oxides 



2. The recently precipitated sulphate dissolves even in the 

 cold, less speedily, however, and perhaps less completely than 

 the carbonate or phosphate. 



3. The borate and tartrate dissolve even in the cold. 



4. The oxalate does not appear to dissolve either in the 

 hot or cold solution. 



The nitrate of ammonia acts much in the same way as the 

 muriate, and a portion of these calcareous salts is retained in 

 the solution of the ammoniacal salts, even after the fluid has 

 been at rest for some time. 



Barytic Salts. — 1. The carbonate, phosphate, and oxalate 

 undergo solution in a cold solution of muriate of ammonia. 



2. The sulphate does not dissolve. 



5. The borate and tartrate undergo solution in the cold 

 salt. A solution of nitrate of ammonia appears to dissolve less 

 of the phosphate of baryta than the muriate of ammonia: it 

 acts much in the same way towards the other barytic salts. 



Strontian Salts. — 1. The carbonate and phosphate are easily 

 dissolved in a cold solution of muriate of ammonia. 



2. The oxalate dissolves in a hot solution of the ammonia- 

 cal salt. 



3. The sulphate does not undergo solution. 



4. The borate and tartrate readily dissolve. 



The solution of nitrate of ammonia appears to exert a 

 greater solvent action over the oxalate of strontia than the 

 muriate of ammonia does; in other respects it does not differ 

 from the latter salt. 



Magnesi an Salts. — 1. The phosphate of magnesia and am- 

 moniaco-magnesian phosphate dissolve in a hot solution of 

 muriate of ammonia. 



2. The carbonate and tartrate dissolve in a solution of 

 muriate of ammonia. 



The nitrate of ammonia appears to exert a less energetic 

 solvent action than the muriate. 



Salts of Lead. — 1. Carbonate of lead is dissolved in muriate 

 of ammonia, especially when the solution of the ammoniacal 

 salt is heated : when the carbonate is in small quantity it is 

 dissolved without heat. 



2. The oxide of the same metal is also dissolved, but it re- 

 quires a longer continuance of the heal. 



3. The sulphate when in small quantity is dissolved with- 

 out heat. 



4. The oxalate is dissolved, especially in the warm ammo- 

 niacal salt. 



5. The tartrate and phosphate are dissolved in the cold so- 

 lution. 



