Gooch and Cole — Chlorine in Haloid Salts. 261 



observed, increases appreciably when the solution is kept hot 

 and allowed to stand. 



In the final series of tests, recorded in Table III, the solu- 

 tion (made up similarly to contain 1 grm. of telluric acid, 10 cmS 

 of sulphuric acid [1:1], with amounts of potassium bromide 

 and potassium chloride ranging as high as 0'5 grm. each) was 

 concentrated to a point about midway between the 20 cm3 and 

 the 15 omS marks. 



H 2 S0 4 

 taken 



H 2 TeO< 

 taken 



KBr 



taken 



Table 



KCl 

 taken 



III.— Final Tests 



Initial Final 

 volume volume 



KBr 



equal to 

 Iodine found 



Error in 



terms of 



Br 



cm 3 . 



10 

 10 

 10 



grm. 



1 



1 

 1 



grm. 

 Iodine 

 01000 

 0-1000 



o-iooo 



grm. cm 3 , 

 s titrated with 

 0-4 50 

 0-4 50 

 0-4 50 



cm 3 . grm. 



N/10 thiosulphate. 



17-18 0-1005 



17-18 0-1003 



17-18 0-1004 



grm. 



+ 0-0003 

 + 0-0002 

 + 0-0003 



10 

 10 

 10 



1 

 1 



1 



0-2000 

 0-2000 

 0-2000 



03 

 0-3 

 0-3 



50 

 50 

 50 



17-18 

 17-18 



17-18 



0-2000 

 0-2005 

 2004 



+ 0-0000 

 + 0-0003 

 + 0-0003 



10 

 10 

 10 



1 

 1 

 1 



0-3000 

 0-3000 

 0-3000 



0-2 

 0-2 

 0-2 



50 

 50 

 50 



17-18 

 17-18 

 17-18 



0-3003 

 0-3001 

 03004 



+ 0-0002 

 + 0-0001 

 + 0-0003 



10 

 10 

 10 



1 

 1 

 1 



0-4000 

 0-4000 

 0.4000 



0-1 



o-i 

 o-i 



50 

 50 

 50 



17-18 

 17-18 

 17-18 



0-4000 

 3998 

 0-3999 



+ 0-0000 

 + 0-0002 

 + 00001 



10 



10 



[10 



1 



1 

 1 



0-5000 

 0-5000 

 0-5000 



0-5 

 0-5 

 0-5 



50 

 50 

 50 



17-18 



17-18 



15 



0-5003 

 0-5004 

 05010 



+ 0-0002 

 + 0-0003 

 + 0-0007] 







Iodine titrated with 



N/50 thiosulphate. 





10 

 10 

 10 



1 

 1 



1 



0-0025 

 0025 

 0025 



01 

 01 



o-i 



50 

 50 

 50 



17-18 



17-18 

 17-18 



0-0025 

 0-0025 

 0024 



0000 

 0000 



-o-oooi 



10 

 10 

 10 



1 

 1 



1 



0-0050 

 0-0050 

 0-0050 



0-2 

 0-2 

 0-2 



30 

 30 

 30 



17-18 

 17-18 

 17-18 



0051 

 0-0050 

 0052 



o-oooo 



+ 0-0001 

 + 0-0002 



10 

 10 

 10 



1 

 1 

 1 



0-0050 

 0-0050 

 0-0050 



0-3 

 0-3 

 0-3 



30 

 30 

 30 



17-18 

 17-18 



17-18 



0-0053 

 0-0051 

 00052 



+ 0-0002 

 + 0-0001 

 + 0-0002 



10 

 10 

 10 



1 

 1 

 1 



00050 

 0-0050 

 0-0050 



0-4 

 0-4 

 0-4 



50 

 50 

 50 



17-18 

 17-18 

 17-18 



0-0052 

 00055 

 0-0057 



+ 0-0002 

 + 0-0002 

 + 0005 



10 

 10 



1 

 1 



0-0055 

 0-0055 



0-4 

 0-4 



50 

 50 



17-18 

 17-18 



0-0055 

 0-0063 



o-oooo 



+ 0-0006 



The results of these experiments show clearly that the 

 method may be relied upon to determine with accuracy amounts 



