Barium, as the Oxalates. 



221 



SrO, 





Volume 



Acid 







taken as 



Ammonium 



at 



present 



SrO 





SrClo. 



oxalate. 



precipitation. 



during 



found. 



Error. 



grm. 



grm. 



cm 3 . 



titration. 



grm. 



grm. 



0-0974 



0-8 



100 



HC1 



0-0971 



— 0-0003 



cc 



cc 



cc 



cc 



0-0980 



+ 0-0006 



u 



a 



cc 



cc 



O<0975 



+ 0-0001 



a 



cc 



cc 



Cl 



0-0980 



+ 0-0006 



cc 



if 



cc 



Cc 



0-0973 



—o-oooi 



u 



cc 



cc 



c 



125 



cc 



0-0978 



+ 0-0004 



0-2425 



0-384 



H 2 SO t 



0-2376 



— 0-0049 



0-2436 



cc 



cc 



cc 



0-2402 



-0-0034 



u 



0-64 



cc 



cc 



0-2411 



— 0-0025 



cc 



0-8 



cc 



cc 



0-2367 



— 0-0069 



cc 



2-0 



cc 



cc 



0-2376 



— 00060 



cc 



cc 



cc 



D 

 250 



cc 



0-2402 



— 0-0034 



0-2436 



0-8 



H 2 S0 4 



0*2443 



+ 0-0007 



a 



cc 



CC 



(C 



0-2446 



+ 0-0010 



cc 



2'0 



cc 



cc 



0-2440 



+ 0-0004 



cc 



cc 



cc 



E 

 500 



cc 



2431 



— 0-0005 



0-2436 



0-8 



H,SO, 



0-2396 



— 0-0040 



a 



2-0 



cc 



cc 



0-2403 



— 00033 



cc 



2-0 



cc 



cc 



0-2413 



— 0-0023 



CC 



4-0 



cc 



a 



0-2410 



— 0-0026 



a 



8-0 



cc 



cc 



0-2407 



— 0-0029 



0-4872 



2'0 



cc 



c; 



0-4837 



— 0-0035 



a 



4-0 



cc 



<c 



0-4855 



— 0-0017 



0-5430 



5-0 



cc 



cc 



0-5422 



— 0-0008 



0-4579 



io-o 



cc 



cc 



0-4554 



-0-0025 



0-7307 



5-0 



cc 



HC1 



0-7262 



— 0-0045 



In the experiments recorded in section A of Table VI, the 

 strontium oxalate was treated with sulphuric acid and titrated 

 at 80°, the volume being 200-300 cm3 ; while in the experiments 

 given in section B, the precipitate was treated with hydro- 

 chloric acid and titrated at 35 -45°, at a volume of 100-200 cm3 , 

 after the addition of O'5-l'O grm. of manganous chloride. 

 The results show that 0*1 grm. of strontium salt, calculated as 

 the oxide, may be estimated as the oxalate with a fair degree 

 of accuracy when precipitated in 100-250 cm3 of water by a 

 sufficient excess of ammonium oxalate. In the experiments 

 recorded in section C, in which the amount of strontium salt 

 in 125 cm3 of water is increased, a negative error is introduced, 



