576 Messrs. Hinshelwood and Bowen on the Rate of 



A. Potassium Permanganate at 240 ( 



Very finely ground in agate 

 mortar. Temperature 240°. 



Per cent, 

 decomposed. 



Time in 

 minutes. 



t. 



4 



7 

 12 

 17 

 22 

 27-5 

 33-0 

 40 

 47 



x. 

 161 

 23-0 

 35-6 

 47-2 

 59-8 

 72-5 

 83-9 

 941 

 98-9 



II. 

 Ground : 



Temperature 240°. 



III. 

 Large crystals. 



240°. 



Time in 

 mimites. 

 t. 

 4 

 6 

 10 

 14 

 20 

 27 

 33*5 

 43 

 50 



Per cent, j Time in 

 decomposed, minutes. 

 x. I t. 



See Fig. 1, Curve I. 



11-5 

 166 

 24-4 

 32-0 

 41-5 

 54-2 

 692 

 920 

 990 



Fig. 1, Curve II. 



o 

 10 

 15 

 20 

 25 

 30 

 35 

 40 

 45 

 50 

 55 

 Fig. 1 



Per cent, 

 decomposed, 



x. 



1-0 



24 



6-3 

 116 

 20-2 

 40-9 

 63-0 

 81-8 

 924 

 98 

 99 

 Curve III. 



B. Solid Solutions of Potassium Permanganate in Potassium 

 Perchlorate at 239°. 



IV. 





V. 





jarge crystals 



of KMnO, 



Solid solution with 82 % 



(for comparison). 



KMnO 



4* 



Time in 



Per cent. 



Time iii 



Per cent. 



minutes, d 



^composed. 



minutes. decomposed 



t. 



X. 



t. 



X. 



105 



5-0 



9 



26 



19 



122 



18 



6-8 



28 



250 



28 



13-5 



33 



36-4 



51 



32-8 



37 



49-6 



60 



409 



39 



55-2 



70 



52-2 



44-5 



71-8 



82 



689 



495 



83-0 



94 



83-0 



54 



93-0 



104 



910 



60 



96-8 



128 



97-7 



73 



99-3 



160 



99-5 



Fig. 2, Cu 



rve I. 



Fig. 2, Curve II. 



VI. 





VII. 





Solid solution 



with 82% 



Solid solution with 268% 



KMn0 4 . 



KMnO 



t . 



Time in 



Per cent. 



Time in 



Per cent. 



minutes. decomposed. 



minutes, decomposed. 



t. 



X. 



t. 



X. 



9 



22 



100 



9-5 



21 



51 



160 



14-7 



32 



110 



210 



20-6 



39 



16-6 



250 



25 - 2 



47 



22-0 



300 



32-1 



61 



34-9 



360 



37-4 



71 



46-6 



700 



87-3 



82 



61-5 







98 



80-0 







110 



920 







130 



970 







145 



98-0 







Fig. 2, Curve III. 



Fig. 2, Curve IV. 



