:. OF J1ABYTA IN ACID SOU r 





ON THE SOLUBILITY OF SULPHATE OF BABYTA IN HYDBO- 

 ILOEIC ACID. 



I thought it advisable to repeat some of the above series, 

 substituting hydrochloric acid for nitric acid, and it will be 

 seen that although sulphate of baryta is less soluble in this 

 acid than in nitric acid, still it is sufficiently so, to cause 

 chemists to avoid its use in excess in delicate analyses. 



The following table shows the results obtained by employ- 

 ing multiple volumes of hydrochloric acid, of sp. gr. 1.0775, 

 with quantities of nitrate of baryta and sulphate of potash, 

 capable of producing 1 gr. of sulphate of baryta. 



On comparing the results contained in this table with those 

 of No. 1 Table of the nitric acid series, it will be seen that 

 instead of the non-formation of a precipitate in jar No. 2, one 

 was produced in the first six jars; sulphate of baryta, t! 

 fore, is less soluble in hydrochloric acid than in nitric acid, 

 and still if we calculate, taking for term of comparison the 

 results obtained in jar No. 7 of hydrochloric acid, it will be 

 Grand that its solubility is equal to one part of sulphate of 

 baryta in 2800 parts of hydrochloric acid ; and consequently 

 the solubility of sulphate of baryta in hydrochloric acid, 

 sp. gr. 1.0775, is fifty times greater than in distilled water. 



