•Jl(i Gooch and Boynton — Estimation of Barium 



Table II. 

 The Separation of Barium from Calcium. 



Water used Amount of 



. BaCi 2 



taken as 



BaCl a .2H 3 



gnu. 



l-U-0859 



2-0-0867 



3-0-0868 



4-0-0865 



5-0-0868 



6-0-0864 



7-0-0866 



8-0-0859 



9-0-0860 



10-0-0S59 



11-0-0864 



CaCl.,.2H.,0 

 taken 

 grm. 



o-iooo 



0-1040 

 0-1022 

 0-1020 

 0-1017 

 0-1016 

 0-3025 

 0-5025 

 1-0020 

 1-0020 

 1-0035 



BaCl 2 

 found 

 grm 

 0-0859 

 0-0867 

 0-0868 

 0-0865 

 0-0869 

 0-0861 

 0-0867 

 0-0859 

 0-0878 

 0-0855 

 0-0867 



Error 

 grm. 



o-oooo* 

 o-oooo* 



0000* 



0-0000* 



+ 0-0001* 



— 0-0003* 

 + 0-0001* 



o-oooo* 



+ 0-0018* 



— 0-0004f 

 + 0-0003f 



to dissolve 

 salts 

 cm 8 . 

 1 

 ] 

 1 

 1 

 1 

 1 



H 



2 

 3 



2 



9 



mixture 

 (4:1) used 

 cm 8 . 

 30 

 30 

 30 

 30 

 30 

 30 



3a 



30 

 30 

 30 

 30 



* The precipitant was added at first at the rate of five drops in the second. 

 f The precipitant was added at the rate of two drops in the second at the 

 outset and later of five drops in the second. 









Table III. 







The Separation of Barium from Magnesium. 





BaCl 2 







Water used 



Amount of 



taken as 



MgCl 2 .6H 2 



BaCl 2 



to dissolve 



mixture 



BaCl 2 .2H 2 



taken 



found 



Error salts 



(4:1) used 



grm. 



grm. 



grm. 



grm. cm 3 . 



cm 3 . 



1-0-0858 







1000 



0-0857 



—o-oooi* 1 



30 



2-0-0869 







1025 



0-0870 



+ 0-0001* 1 



30 



3-0-0858 







1025 



0-0858 



o-oooo* 1 



30 



4-0-0862 







1010 



0-0863 



+ 0-0001* 1 



30 



5-0-0858 







1006 



0-0860 



+ 0-0002* 1 



30 



6-00860 







1020 



0-0859 



— 0-0001* 1 



30 



7-0-0860 







1010 



0-0862 



+ 0-0002* 1 



30 



8-0-0865 







3010 



0-0867 



+ 0-0002* 1| 



30 



9-0-0864 







5000 



0-0867 



+ 0-0003* 2 



30 



10-0086S 



1 



0015 



0-0878 



+ 0-0010* 3 



30 



11-0-0853 



1 



0010 



0-0854 . 



+ 0-0001f 3 



30 



* The precipitant was added at the r 

 f The precipitant was added at first 

 and later of five drops in the second. 



ate of five drops in the second. 



at the rate of two drops in the second 



to 135°. Obviously the salt was essentially SrCl 2 .2H„0, which 

 should contain theoretically 18-51 per cent of water. This 

 precipitate of SrCI„.2H 2 when treated with a mixture of ace- 

 tone and acetyl chloride containing a larger proportion of the 

 latter, goes into solution and is again partially precipitated upon 

 increasing the" proportion of /.cetone, essentially as SrCl„.2H,0. 



