COMBINATIONS OF OXIMURIATIC ACID AlfiD METALS. ]Q 



Hence 100 of atannanea appear to be composed of 

 42-1 tin 

 57"9 chlorine 



100- 

 1 am not acquainted with any analytical method for di- 

 rectly ascertaining the proportion of chlorine in either of the 

 two preceding- combinations. Nitrate of silver, when imme- 

 diately applied, will not answer the purpose, because the 

 oxide of silver is partially reduced by the solution of stan- 

 nane; and an ovide of tin is thrown down in mixture with 

 the horn silver from the liquor of Libavius. 



Mr. Proust, to whom we are indebted for very excellent s^bmuriateof 

 investigations of the different combinations of copper and *'"* 

 tin, first discovered a submuriate of tin. He found that a 

 solution of potash precipitated from the solution of muriate 

 of tin this compound, and not the pure gray oxide of tin. 



I have obtained it by this method, and all its properties, its ^jropenies. 

 which 1 have observed, are perfectly agreeable to its sup- 

 posed composition. 



It is decomposed by a red heat. Subjected to distillation 

 in a small bent glass tube connected with mercury, no gas 

 was produced, water containing muriatic acid and muriate of 

 tin was expelled, and a sublimate like stannane was formed, 

 and the fixed residue was gray oxide of tin. 



It effervesces violently with nitric acid; and strong sul- 

 phuric acid expels from it muriatic acid fumes. 



It dissolves without effervescence in the muriatic and 

 acetic, and in the dilute nitric and sulphuric acids; and all 

 these acid solutions, as they give a black precipitate with a 

 solution of corrosive sublimate, appear to contain the tin in 

 the stale of gray oxide. 



The complete analysis of this submuriate of tin is difficult. Analysis of it 

 The oxide it contains cannot be accurately separated by- 

 potash, nor can nitrate of silver be employed to ascertain the 

 proportion of muriatic acid. 



I have found 50 grains of it, dissolved in muriatic acid, to 



afford, when precipitated by zinc, 31 grains of metallic tin. 



Now as this submuriate issini'larto the submuriate of copper, 



the analogy being imperfect only in the latter containing the 



C 2 per- 



