664: Dinwiddle — Separation of Magnesium. 



Table II. 



Separation of Magnesium from Lithium. 



Solution 



of 



MgCl 2 



grm. 



14-8191 

 15-1409 



20-7421 

 20-1706 

 19-9744 

 20-3998 

 19-9291 



LiCl=0= 

 taken 



Li 



grm. 



0-5 



1-0 



grm. 



0-083 

 0-166 



0-5 0-083 



0-5 0-083 



1-25 0-207 



1-25 0-207 



2-10 0-347 



MgO 

 taken 



0-2831 

 0-2753 



0-2727 

 0-2785 

 0-2718 



MgO 

 found 



grm. grm. 



0-2023 0-2028 

 0-2067 0-3191 



0-2834 

 0-2761 

 0-2730 



0-2783 

 0-2730 



Number of 

 precipi- 

 Error tations 



grm. 



+ 0-0005 

 + 0-1124 



+ 0-0003 

 + 0-0008 

 + 0-0003 

 — 0-0001 

 + 0-0012 



with lithium carbonate, when the amounts of lithium are con- 

 siderably greater. Two precipitations made in the manner 

 described will yield, however, a very fair separation of the 

 magnesium (about 0'3 grm. of the oxide) from lithium chloride 

 equivalent to 0*2 grm. -0-3 grm of the element. 



The author wishes to thank Prof. Gooch for advice and 

 assistance in carrying out the above work. 



