c. 



Chemical Action in the Crystalline State. 

 Experiments at lower temperature. 



:>77 



VIII. 



Potassium permanganate 



finely ground with MnO, 

 (220°). 

 Time in Per csnt. 



minutes, decomposed. 



D. 



t. 



X. 



4 



8-9 



9 



16 -6 



17 



255 



27 



336 



39 



42-9 



52 



512 



67 



614 



82 



714 



95 



78-4 



115 



86-9 



138 



930 



166 



97-7 



Fig. 3 



Curve I. 





X. 



Finely ground IvMnO, 



(2 



20°-5). 



Time in 



Per cent. 



minutes. 



decomposed. 



t. 



X. 



11 



18-1 



30 



28-2 



40 



352 



52 



443 



63 



50-5 



75 



56-3 



98 



66-6 



111 



72-0 



125 



78-1 



152 



90-2 



182 



963 



225 



99-0 



' ^g. 3, 



Curve III. 



A mmonium Bicliroi 



Time in 



Per cent. 



minutes. 



decomposed. 



t. 



X. 



5 



24 



12 



5-2 



18 



80 



24 



99 



32-5 



135 



40 



172 



46 



20 -5 



52 



242 



59 



282 



65 



320 



75 



38-0 



85 



444 



95 



50-3 



807 



59-9 



IX. 



Similar to V I 1 1 . 



Time in 



Per cent. 



ninutes. 



decomposed. 



t. 



.r. 



7 



8-6 



19 



194 



35 



290 



45 



35-5 



55 



41-2 



67 



494 



75 



559 



87 



650 



105 



78-2 



135 



93-3 



150 



950 



3, Curve II. 

 XI. 



arge crystals of KMnO t 





(21 



7°). 



Time 



in 



Per cent. 



minut< 

 t. 

 15 



33. 



decomposed 





1-4 



40 





35 



50 





5-5 



79 





154 



95 





203 



110 





262 



130 





34-8 



140 





400 



150 





44 



170 





56-0 



185 





650 



200 





743 



230 





85-4 



243 





91-6 



295 





99-6 



Fig. 3, Curve IV. 



mate at 219° C. 



XII. 



Time in 



Per cent. 



ninutes. 



decomposed 



t. 



.'■. 



127 



l)72 



136 



720 



149 



797 



L64 



82-7 



194 



89-5 



219 



917 



257 



946 



307 



96 1 



332 



979 



352 



98-5 



Fig. 4. 



