COMBINATIONS OF OXALIC ACID, S9 



tradictory to all the analyses of salts with base of strontian 

 and barytes hitherto known. 



On the other hand, after having ascertained, by an experi- Supposed he • 

 ment similar to that I have just mentioned, the proportions pero^lat^oT* 

 of oxalate of strontian, he repeated it a second time by first strontian : 

 neutralizing a given weight of oxalic acid with ammonia, 

 and afterw*d precipitating by muriate of strontian: but in 

 this way he found, that the strontian combined with twice as 

 much acid as he found at first; whence he inferred, that the 

 salt obtained in this process was asuperoxulate of strontian, 

 in which the strontian was combined with twice as much acid 

 as in the neutral oxalate. 



The little solubility of the oxalate of strontian perhaps tut this doet 

 misled Dr. Thomson: but it seems to me demonstrated,"" 

 that, in precipitating neutral muriate of strontian by the 

 neutral oxalate of ammonia, a salt with excess of acid can- 

 not be formed, for the residuum remains neutral. In the 

 next place, I do not think, that an acid oxalate of strontian 

 exists; for I have not been able to form it, in employing the 

 same means as for the other oxalates ; and, besides, the neu- 

 tral oxalate of strontian is very little soluble in an excess of 

 its acid. Lastly, since the proportions he gives for the neu- 

 tral oxalate are not accurate, his simple ratio between the 

 neutral and acid oxalate is done away. 



Oxalate of barytes. 



This salt is more soluble in water than oxalate of stron- Oxalate of iss- 

 tian. 'i'^^'' 



10 gr. of the same crystallized oxalic acid were neutral- 

 ized by barytes. The oxalate, urged in the fire, yielded 

 15*3 gr. of carbonate of barytes; which, when decomposed 

 by sulphuric acid, left 11-934 gr. of barytes*. 



• I have found by my experiments, that carbonate of barytes is com- 

 posed of 



Barytes 78 Componeat 



Acid 22 parts of car' 



. bonate of b&< 



100. rytes= 



These are the same preportronSj as Klaproth assigns it. 



From 



