Brown — Work on the Interaction of Hydrochloric Acid. 55 



The variations above noted mast therefore be due to some 

 secondary reaction occurring during the digestion. The 

 experiments outlined in Table YI were therefore made with 

 varying periods of digestion, to note more carefully the pro- 

 gress of these variations. The manner of experimentation was 

 to digest solutions made up as were those of Table Y on the 

 water bath during varying periods of time with the Yoit flask 

 trapped with potassium iodide solution to prevent escape of 

 chlorine. After the digestion an excess of potassium iodide 

 solution was added and the liberated iodine determined by 

 use of sodium thiosulphate. In this way the total oxidizing 

 material formed during digestion is estimated in one operation 

 rather than in two, as was the case in the experiments of Table 

 Y. Results are indicated in Table YI. 



Table VI. 

 Oxygen value, KMnO 4 = 0003894 grm. per cm 3 , 

 grin, per cm 3 . 9"90 cm3 KMnO 4 =10-80 cm3 Na 2 S 2 3 



Iodine value Na 2 S 2 O 3 = 0-005671 

 l cm3 Na 2 S 2 O3=0-917 cm3 KMn0 4 . 



N 



N 







S3 

 o 



CD 









yHCl 



io HU1 



H 2 



KMn0 4 



CQ 





Na 2 S 2 3 



KMn0 4 



KMn0 4 







bcs 



«3 . 





equiv. 



lost 



cm 3 . 



cm 3 . 



cm 3 . 



cm 3 . 



H3 g 

 CD 



a 



Eh 



a 



CD 



H 



cm 3 . 



cm 3 . 



cm 3 . 



100 



990 



0.00 



9-90 



5 



50 



10-71 



9-82 



0-08 



100 



9-90 





9-90 



10 



50 



10.58 



9-70 



0-20 



100 



9-90 



__ 



9-90 



15 



50 



10-48 



9-61 



0-29 



100 



9-90 



„ _ 



9-90 



30 



50 



10-42 



9-55 



0-35 



100 



9-90 



.. 



9-90 



45 



50 



10-39 



9-52 



0-38 



100 



9-90 





9-90 



60 



50 



10-21 



936 



,0-54 



CdCl 2 



100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 

 100 



9-90 



9-90 



9-90 



9-90 



9-90 



990 



9-90 



9-90 



9-90 



9-90 



9-90 



25-00 



50-00 



[2 grras.] 



9-90 



9-90 

 9-90 

 9-90 

 9-90 

 9-90 

 990 

 9-90 

 9-90 

 990 

 9-90 

 9-90 

 9-90 

 9-90 

 9-90 



5 

 5 

 10 

 10 

 15 

 15 

 15 

 15 

 30 

 45 

 60 

 60 

 60 

 60 



50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 

 50 



10- 

 10- 

 9- 

 9- 

 9- 

 9" 

 9- 

 9- 

 9- 

 9- 

 9- 

 7 

 4- 



o- 



•35 



9'^ 



•39 



9% 



•70 



8-1 



•75 



8-< 



•31 



8% 



•43 



8-( 



•50 



8- 



•52 



8- 



•39 



8- 



•36 



8- 



•07 



8- 



•34 



6- 



•64 



4- 



•81 



o- 



49 

 52 

 89 

 94 

 53 

 64 

 71 

 72 

 61 

 58 

 31 

 73 

 25 

 74 



0-41 

 0-38 

 101 

 0-96 

 1-37 

 1-26 

 1-19 

 1-18 

 1-29 

 1-32 

 1-59 

 3-17 

 5-65 

 9-16* 



