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Van Name and Hill — Solution, of Metals 



Table X. 



Cr() a , 0015 molar. 



Iron. 



No. of 

 Exp. 



H a SO., , 0-25 molar. 











K 



1. 



1 cm 8 KMn()4=0-385 



cm 8 FeSO-4. 











V = 



580 560 



540 



520 



500 



480 



460 





At = 



10 10 



10 



10 



10 



10 



10 





c = 



6'95 13-87 20'02 25'60 30'60 3510 3917 42'70 



fci = 



9-67 9-85 



1036 



10 93 



11-82 



13-25 



14-86 





k = 



966 9-85 



10-37 



1094 



11-83 



13 25 



14-86 



11'54 



2. k = 



9-61 10-39 

 HySCh , 5 molar. 



10 34 



11-02 



12-10 



14-09 



15-22 



, 1T82 



3. k - 



3-78 4-16 



4-14 



4-14 



4-08 



4-27 



4-49 



415 



4. A: = 



3-96 410 



412 



4-19 



4-39 



4-52 



4-49 



425 



5. k — 



3-93 3-99 



4-11 



4-32 



4-31 



4-24 



4-48 



420 



Nickel. 

 H2SO4 , - 25 molar. 

 Disk immersed in dil. HC1 in contact with zinc. 





7c = 



5-75 



5-95 



5-80 



5-40 



5-80 



5-54 



6-12 



577 



7.* 



Disk treated as in Exp. 1 

















k = 



4-71 



6-00 



6-92 



6-76 



7-05 



6-80 



6-80 



643 



8.* 



Disk treated as in Exp. 1. 

















k = 



5-92 



4-56 



3-48 



2-71 



3-27 



3-40 



3-51 



384 



g * 



Disk cleaned with 2 : 1 HNO3 after each reaction period. 









k — 



0-49 



1-54 



1-35 



0-03 



1-71 



0-09 



1-04 



089 



10.* 



Disk cleaned with warm ] 



: 2 HNO3 after each reaction period. 







k = 



0-37 

 H 2 S0 4 , 



5-96 

 5 molar. 



6-01 



5-67 



4-48 



3-68 



4-82 



443 



11. 



k = 



2-55 



2-64 



2-70 



2-66 



2-58 



2-78 



2-56 



264 



12. 



k — 



2-61 

 EUSO4, 



2-71 

 5 molar. 



2-72 



2-71 

 Tin. 



2-69 



2-75 



2-71 



270 



13. 



k = 



2-76 



2-72 



2-80 



2-72 



2-68 



2-68 



2-78 



273 



14. 



k = 



2-84 

 H,S04 , 



2-74 

 0'25 molai 



2-78 



2-72 

 Silver. 



2 66 



2-73 



2-74 



2-74 



15. 



k = 



4-51 



4-30 



4-28 



4-24 



4-52 



4-54 



4-40 



4-40 



16. 



k = 



431 



4 43 



4-02 



4-25 



4-03 



4-22 



4-15 



420 



17. 



k = 



4-35 

 H 2 S04, 



4-17 

 5 molar. 



4-35 



4-10 



4-21 



4-24 



4-17 



423 



18. 



k = 



d-53)t 



1-26 



1-20 



1-18 



1-21 



1-23 



1-24 



122 



19. 



k = 



(l'52)f 



1-28 



1-29 



1-21 



1-21 



1-18 



1-19 



123 



Initial velocities by extrapolation : Exp. 15, 4'40 ; Exp. 16, 4-27 ; Exp. 17, 4'28 ; 

 Exp. 18, 1-22; Exp. 19, 1-31. 



* Chromic acid determined by iodometric method. t Not included in average. 



