Gooch and Cole — Chlorine in Haloid Salts. 



259 



volume was made up with water to 4o cm3 . The sulphuric acid, 

 10 cm3 of [1 : 1] strength, was added. The connection was made 

 between the flask and the receiver charged with 300 cm3 of a 1 

 per cent solution of potassium iodide, carbon dioxide was 

 passed slowly through the apparatus, and the liquid in the 

 flask, heated gradually at first, was concentrated by boiling to 

 the desired volume. 



Table I. — Preliminary Tests. 



l,Te0 4 

 taken 



H 3 SO< [1:1] 



KBr 

 taken 



10cm 3 : 



KCI 

 taken 



Initial Volume, 50cm 3 -55cm 3 

 KBr 

 Final equal to 

 volume Iodine found 



Error in 

 terms of 

 Br. 



grm. 



grm. 



grm. 



A. 



cm 3 . 



grm. 



grm. 



0-5 

 0-5 

 0-5 

 0-5 

 0-5 



1 



o-i 



0-2 

 0-3 



0-4 

 0-5 



20 

 20 

 20 

 20 

 20 



none 

 none 

 none 

 none 

 none 



none 

 none 

 none 

 none 

 none 



10 



1-0 

 1-0 

 10 

 10 



---- 



o-i 



0-2 

 03 

 0-4 

 05 





20 

 20 

 20 

 20 

 20 



none 

 none 

 none 

 none 

 none 



none 

 none 

 none 

 none 

 none 



0-5 

 05 

 05 

 05 



01000 



o-iooo 

 o-iooo 

 o-iooo 







B. 



20 

 20 

 20 

 20 



0-1002 



o-iooo 

 o-iooo 



0-0999 



+ 00001 



o-oooo 



o-oooo 



-o-oooi 



05 

 0-5 

 0-5 

 0-5 



1000 



o-iooo 

 o-iooo 

 o-iooo 



o-i 



01 

 0-3 

 0-3 



C. 



20 

 20 

 20 

 20 



0991 

 0-0996 

 0-0995 

 0-0995 



-00006 

 -0-0003 

 -0-0002 

 -0-0002 



0-5 

 0-5 

 0-5 



0-2000 

 02000 

 0-3000 



0-3 

 0-3 

 0-3 





20 

 20 

 20 



0-1996 

 0-1994 

 0-2992 



-0-0003 

 -0-0004 

 -0-0005 



1-0 

 1-0 

 l'O 



0-3000 

 3000 

 0-4000 



0-3 

 0-3 



o-i 



D. 



20 

 20 

 20 



0-2996 

 0-2994 

 0-4000 



-0-0003 



-0-0004 



0-0000 



1-0 

 1-0 



0-5000 

 0-5000 



o-i 

 o-i 





20 

 20 



0-4980 

 0-4986 



-00013 

 -00010 



These preliminary tests showed that (A) in the process of 

 concentrating from a volume of 50 cm3 — 55 om3 to a volume of 

 20 cm3 a solution containing 0*5 grm. or 1 grm. of telluric acid 

 with l0 om3 of sulphuric acid [1:1] no chlorine was eliminated 

 from potassium chloride taken in amounts up to 0*5 grm. : that 



