Brown — Work on the Interaction of Hydrochloric Acid. 53 



Table V (continued). 



Oxygen value KMnO 4 =0 '0003904 grm. per cm 3 . 



Iodine value, Na 2 S 2 3 =0*005726 grm. per cm 3 . 9-90 cm3 KMnO 4 =10-71 cm3 Na ? S 2 3 . 

 l<= m3 Na 2 S 2 O 3 =0-924 cm3 Na 2 S 2 3 . 



2Qcm3 ^(H 4 N) 2 C 2 O4=40-98 cm3 KMn0 4 



-HC1 



NHAUCI4 



10 4 



9-90 

 9-90 

 9-90 

 9-90 

 9-90 



KM11O4 



9-90 

 9-90 

 9-90 

 9-90 

 9-90 



.2F3 

 » a 



a. 2 



60 

 60 

 60 

 60 



60 





50 

 50 

 50 

 50 

 50 



IS 



H ft 



30 

 30 

 30 

 30 

 30 



Cl retained 

 during- digestion 



Na 2 S 2 3 

 cm 3 



•62 



•77 

 •80 

 •83 

 •83 



KMn0 4 



equiv. 

 cm 3 



•95 

 ■09 

 •12 

 •15 

 •15 



Oxidizing mate- 

 rial not Cl formed 

 during digestion 



Na 2 S 2 3 



cm 3 



KMn0 4 



equiv. 

 cm 3 



1-32 

 1-32 

 1-32 

 1-32 

 1-32 



Total 

 KMn0 4 

 found 



cm 3 



9-27 

 9-41 

 9-44 

 9-47 

 9-47 



KMn0 4 

 lost 



0-63 

 0-49 

 0-46 

 0*43 

 0-43 



10 



MnCl 2 



cm 3 



9-90 

 990 

 9-90 

 9-90 

 9-90 

 9-90 



9 90 



60 



50 



30 



4-81 



4-43 



5'51 



5-08 



9-51 



9-90 



60 



50 



30 



5-71 



5-27 



4-86 



4-48 



9-75 



9-90 



60 



50 



30 



5-63 



5-19 



4-74 



4-37 



956 



9-90 



60 



50 



30 



5-52 



5-09 



4-88 



4-50 



9-59 



9-90 



60 



50 



30 



5-85 



5 39 



4-63 



4-27 



966 



9-90 



60 



50 



30 



5-77 



5-32 



4-81 



4-43 



9-75 



Here it is seen that the total oxidizing material retained in 

 solution, or the "total KMn0 4 found" is substantially the 

 same with hydrochloric acid alone, and in the presence of auric 

 and ferric chlorides. With cadmium chloride there is a con- 

 siderable falling off in the chlorine retained in solution while 

 the residual oxides of manganese show on the average only a 

 slightly smaller value than with hydrochloric acid alone. 

 There is, therefore, a deficiency of about l*00 cm: ' in " total 

 KMn0 4 found" as compared with the value found with hydro- 

 chloric acid alone. With platinic chloride the " total KMn0 4 

 found," or oxidizing material retained in solution, in this case 

 all chlorine, is substantially equal to that found with hydro- 

 chloric acid alone. With chromic chloride there is a defi- 

 ciency after adding together the permanganate equivalents of 

 the chlorine retained in solution and the " oxidizing material 

 not Cl," presumably in this case chromic acid. With manga- 



0-39 

 0-15 

 0-34 

 0-31 

 0-24 

 0-15 





N 

 ^MnS0 4 





















cm 3 



















100 



9-90 



9-90 



60 



50 



30 



5-72 



5-27 



4-79 



4-42 



9-69 



0-21 



100 



9-90 



9-90 



60 



50 



30 



5-66 



5-22 



4-83 



4-45 



9-67 



0-23 



100 



9-90 



9-90 



60 



50 



30 



5-42 



5-00 



5-09 



469 



9-69 



0-21 



100 



9-90 



9-90 



60 



50 



30 



5-78 



5-33 



4-73 



4-36 



9-69 



0-21 



100 



9-90 



9-90 



60 



50 



30 



4-23 



3-90 



636 



5-87 



9-77 



0-13 



