44 Brown — Work on the Interaction of Hydrochloric Acid. 



[20 c 



,N 

 20 



Table I (continued). 



(H 4 N) 2 C.,O 4 =2009 cm3 KMn0 4 . Oxygen valve KMn0 4 =0-0003982 

 grm. per cm 3 . 9-90 cm3 H 2 C 2 O 4 =19-62 cm3 KMnO 4 .] 



N 



HC1 



HAnCl. 



100 



9-90 



100 



9-90 



100 



9-90 



100 



9 90 



100 



9-90 



KMn0 4 



before 



digestion 



9-90 

 9-90 

 9-90 

 9-90 

 9-90 



o 



50 



50 

 50 

 50 

 50 



60 

 60 

 60 

 60 

 60 



H 2 C 2 4 



cm°. 



9-90 

 9-90 

 9-90 

 9-90 

 9-90 



KMn0 4 

 to color 



1.". 

 13 

 13 

 14 

 13 



97 

 73 

 35 



27 



KMn0 4 

 appar- 

 ently re- 

 duced 

 during 

 digestion 

 cm 3 . 



4-25 

 4-01 

 3-63 

 4-55 

 3-30 



KMn0 4 

 appar- 

 ently un- 

 reduced 

 during 

 digestion 

 cm 3 . 



5-65 



5-89 



6-27- 



5-35 



6-60 





l Fec] > 















- 





cm 3 . 

















100 



9-90 



9-90 



50 



60 



9-90 



13-46 



3-74 



6-16 



100 



9-90 



9-9.0 



50 



60 



9-90 



14-45 



4-73 



5-17 



100 



9-90 



9-90 



50 



60 



9-90 



13-72 



4-00 



5-90 



100 



9-90 



9-90 



50 



60 



9-90 



14-01 



4-29 



5-61 



100 



9-90 



990 



50 



60 



9-90 



1392 



4-20 



5-70 



From these results it may be seen that in accordance with 

 Wagner's views, there is more permanganate required to bring 

 about final coloration in those experiments in which the various 

 chlorides which lie regards as catalyzers are used than in their 

 absence. To ascertain whether these differences are due to the 

 interfering action of the chlorine as shown with ferric chloride 

 in the previous paper,* the experiments of Table II were per- 

 formed in a manner identical with those of Table I, except that 

 a current of air dried and purified was passed through the 

 liquid while digesting to remove the chlorine. 



The results of these experiments are outlined in Table II. 



Table II. 

 [KMn0 4 and H 2 C 2 4 solutions same as used in Table I.] 







KMn0 4 



b 



.2 







KMn0 4 



KMn0 4 



N TT ™ 



N 



before 



CO 



02 

 CO 



H 2 C 2 4 



KMn0 4 



appar- 



appar- 



yHCl 



io HC1 



digestion 



~c3 



'S 3 





to color 



ently re- 

 duced 



ently un- 

 reduced 









CO 



^ 





cm 3 . 



during 



during 



cm 3 . 



cm 3 . 



cm 3 . 



a 



co 

 H 



CO 



cm 3 . 



digestion 



digestion 









d 



60 







cm 3 . 



cm 3 . 



100 



9-90 



9-90 



50 



9-90 



1814 



8-42 



8-48 



100 



9-90 



9-90 



50 



60 



9-90 



18-12 



8-40 



8*50 



100 



9-90 



9-90 



50 



60 



9-90 



18-08 



8-36 



8-54 



100 



9-90 



990 



50 



60 



9-90 



18-09 



8-37 



8-53 



100 



9-90 



9-90 



50 



60 



9-90 



18-10 



8-38 



8-52 



*Loc. cit., p. 36. 



