on Potassic Chlorate and Pevclxlorate. 



377 



r=n = 3'7028 or *6300, — values which indicate the reduction 

 of the chemical change to a mere action of mass. 



Action of Heat on Potassic Perchlorate. 



The equation of Cumulative Resolution is 



(7i + l)KC10 4 -(2w-l)O s = 2KC10 3 +(w-l)K01; 



the products of the reaction being chlorate, chloride, and 

 oxygen. Its starting-point is a point in the chlorate equa- 

 tion, viz., (n+l)KC10 4 . In this case the percentage of 

 chlorate cannot exceed a certain amount, viz., that indicated 

 by the relation given by n=l, or 



2KC10 4 -0 2 = 2KC10 3 , 

 = 88*46 per cent. 



A comparison of theory with experiment can be made on 

 a basis similar to that previously taken, viz. : — 



r x 



_0* 

 KOI 



or 



When n 



•42867 r = 



n-1 

 2n-V 



n-1 



2n-l 



a , the equation reduces to 

 KC10 4 -20 2 = KCL 



Table II. 



Number of 

 Experiment. 



Oxygen, 



per cent. 



Chloride, 

 per cent. 



r. 



11. 



Authority. 



1, 



3-10 



2-97 



•95806 



3-2992 



Teed. 



2. 



447 



441 



•98658 



37430 





3. 



7-30 



7-82 



10712 



66275 





4. 



35-21 



4033 



1-1454 



28-278 





5. 



6-34 



* 6-7148 



10591 



5-9348 



FranHand & Dingwall. 



6. 



7-80 



* 8-2600 



1-0590 



5-9300 





7. 



24-05 



*27145 



1-1287 



15970 



5> 



In this case r cannot be equal to n. As regards the pro- 

 portion of chlorate formed, it has been stated by all three 

 investigators that this diminishes as the reaction proceeds. 

 Frankland and Dingwall have made actual determinations of 

 its amount. In order to compare this part of their work with 

 theory, I have taken their experimental ratio p of chloride 

 to chlorate, and calculated it from the estimations, made in 



* .Recalculations. 



