540 Gooch and Soderman — Barium and Strontium. 



acid (38%) and ether (applied in a fine jet from a small 

 wash bottle), is dried at 150° and weighed as anhydrous 

 barium chloride. 



The results of experiments made in the manner 

 described upon weighed amounts of hydrous barium 

 chloride and anhydrous strontium chloride are given in 

 the following table : 



Precipitation by 4:1 Mixture of Hydrochloric 

 Acid {33%) and Ether. 













Volume 



C1 2 .2H 2 



SrCl 2 



Theory 



BaCl 2 





of 



taken 



taken 



BaCl 2 



found 



Error 



Precipitant 



grm. 



grm. 



grm. grm. 



A 



grm. 



cm 3 



0-5002 





0-4264 



0-4260 



—00004 



50 



0-5002 





0-4264 



0-4260 



—00004 



50 



01006 





00857 



00855 



—00002 



50 



00100 





0-0082 



0-0083 



+00001 



50 



00010 





0-0008 



0-0008 



00000 



50 



0-0100 





00082 



0-0082 



00000 



75 



0-4003 



00620 



B 

 0-3412 0-3408 



—00004 



50 



0-3005 



01200 



0-2562 



0-2560 



—00002 



50 



0-2001 



01820 



01706 



0-1705 



—00001 



50 



01006 



0-2480 



0-0858 



0-0855 



—00003 



50 



00503 



0-2480 



00426 



0-0428 



+0-0002 



50 



00010 



01000 



00008 



00008 



00000 



50 



01006 



0-2480 



0-0857 



00856 



—00001 



75 



00100 



0-3100 



0-0082 



0-0084 



+0-0002 



75 



00010 



0-3000 



00008 



0-0008 



0-0000 



75 



These results show that barium and strontium may be 

 satisfactorily separated by treating the saturated solu- 

 tion of the chlorides with a 4 : 1 mixture of hydrochloric 

 acid of 33% strength and ether, and washing the precipi- 

 tate with a 4 :1 mixture of concentrated hydrochloric acid 

 (38%) and ether, according to the procedure described. 



