Randall — Ferric Chloride in the Zinc Reductor. 129 













Table I. 





















Volume 













FeCl 3 





HoS0 4 





at titi*a- 







Fe 







taken. 



Fe. 



2-5%. 



HC1. 



tion. 



Mnscv 



KM11O4. 



: ound. 



Error. 



Exp. 



cm 3 . 



grm. 



cm 3 . 



cm 3 . 



cm 3 . 



grm. 



cm 3 . 



?rms. 



grms. 



1* 



20 



•0349 



100 







600 







19-50 



0354 



+ •0005 



2* 



20 



0349 



100 







600 







1953 



0354 



+ •0005 



3* 



20 



0349 



100 







600 







19-45 



0353 



+ •0004 



4* 



20 



0349 



100 







600 







19-49 



0354 



+ •0005 



5* 



20 



0349 



100 







600 



1-00 



19-30 



0350 



+ •0001 



6* 



20 



0349 



100 







600 



1-00 



19-30 



0350 



+ •0001 



7* 



20 



0349 



]00 







600 



1-00 



19-20 



0348 



— •0001 



8* 



20 



0349 



100 







600 



1-25 



19-28 



9349 



±•0000 



9 



20. • 



0349 



100 







■ 600 



1-25 



19-35 



0351 



+ •0002 



10 



20 



0349 



100 







600 



1-25 



19-20 



0348 



— •0001 



11 



20 



0349 



100 







600 



1-25 



19-30 



0350 



+ •0001 



12 



20 



0349 



100 







600 



1-25 



19-21 



0348 



— •0001 



13 



20 



0349 



100 



5 



600 



1-25 



19-29 



0350 



+ •0001 



14 



20 



0349 



100 



10 



600 



1-25 



19-30 



0350 



+ •0001 



15 



20 



0349 



100 



20 



600 



1-25 



19-50 



0354 



+ •0005 



16 



20 



0349 



100 



20 



600 



1-25 



19-50 



0354 



+ ■0005 



17 



20 



0349 



100 



15 



600 



1-25 



19-22 



0348 



— •0001 



18 



20 



0349 



100 



20 



1000 



2-50 



19-32 



0350 



+ •0001 



19 



20 



0349 



100 



20 



1000 



2-50 



19-30 



0350 



+ •0001 



20 



20 



0349 



100 



30 



1000 



2-50 



19-31 



0350 



+ •0001 



21 



20 



0349 



100 



30 



1000 



2-50 



19-37 



0351 



+ •0002 



22 



20 



0349 



100 



35 



1000 



2-50 



19-45 



0353 



+ •0003 



23 



20 



0349 



100 



40 



1000 



2-50 



19-50 



0354 



+ •0005 



24 



20 • 



0349 



100 



50 



1000 



2'50 



19-50 



0354 



+ •0005 



In the last seven experiments by diluting abundantly it was 

 possible to work with a greater amount of free acid. Having 

 found the work to go successfully with small amounts of iron 

 and dilute permanganate solutions the experiment was con- 

 tinued with the use of more ferric chloride and a stronger per- 

 manganate solution. 













Table II 





















Volume 















Fe 



H,S0 4 





at titra- 







Fe 







FeCl 3 



taken. 



2-5*. 



HC1. 



tion. 



MnS0 4 . 



KM11O4. 



found. 



Error. 



,xp. 



cm 3 . 



grms. 



cm 3 . 



cm 3 . 



cm 3 . 



grms. 



cm 3 . 



grms. 



grms. 



1 



25 



•0437 



100 







600 





7-70 



•0434 



— •0003 



2 



25 



•0437 



100 







600 





7-73 



•0435 



— •0002 



3 



25 



•0437 



100 







600 





7-76 



•0438 



+ •0001 



4 



25 



•0437 



100 







600 





7-74 



•0436 



— •0001 



5 



25 



•0437 



100 







600 





7-75 



•0437 



±•0000 



6 



50 



•0874 



100 







600 





15-50 



•0874 



±•0000 



7 



50 



•0874 



100 







600 





15-49 



•0873 



— •0001 



* C0 2 was used in receiving flask. 



