The Oxidation of Cane Sugar. 



233 



Table TX. 



Velocity of the reaction at 84-5X1 



N N N 



50CCS.— KMnO^, 15ccs.^ — sugar and Ice— H._.SO^ were used iu every 

 50 oOO 2 



* The temperature of Experiment 8 was 85''C. 



It will be seen that at 101 °C. the action reaches its theoretical 

 limit in 20 minutes, but the secondary action is so appreciable 

 that an error of 1 per cent, would be produced by allowing the 

 action to continue for one minute longer. At 94°C., about 35 

 minutes are required, and at 84-5°C., about 65 minute.s, but in 

 these cases an error of two or three minutes is insignificant. 



It was now necessary to vary the amount of sugar present, for 



in these three series of experiments, 15ccs. of ^^ sugar solution 

 had been employed in each case. 



The following experiments show that under the conditions of 

 experiment the amount of action is considerably influenced by 

 the volume of the solution, and in this particular case the 

 number of oxygen atoms " abstracted " per molecule of sugar 

 varies inversely as the square root of the volume, approximately. 

 This is evidently an empirical relation only. 



