The Oxidation of Cane Sugar. 



231 



As in all these series of experiments, the presence of the acid 

 exercises a notable effect, it was thought advisable to determine 

 the amount of reduction undergone by an ordinary standard 

 solution of KMn04 when heated with varying amounts of dilute 

 H0SO4 at different temperatures. 



The amount of reduction was estimated by titration against 

 [Fe.] Solution. 



Table VI. 

 No sugar was employed in these experiments. 



It seemed possible that a method based on this reaction might 

 be worked out for the estimation of cane sugar in dilute solutions 

 somewhat on the lines of the Forchammer process, which is used 

 for the detection and estimation of organic matter in potable 

 and other waters. 



It will of course be necessary to make a correction for the 

 secondary action or to render it inappreciable. 



Several series of experiments have been carefully performed 

 with the object of measuring the velocity of the reaction at 

 different temperatures : these will indicate (a) the time required 

 for the theoretical amount of KMnOi to be reduced, {l>) the 

 effect due to the secondary action on continuing the experiment 

 beyond that time. 



It should be possible from the laws of mass action to calculate 

 the amount of KMn04 reduced in any given time. 



