OXIDATION OF SUCROSE BY POTASSIUM PERMANGANATE. Das 
Furthermore, if the conclusion arrived at be correct, the 
rate at which the velocity of reaction increases in any one 
experiment should not be altered by varying the acid con- 
7 centration, and this was found to be the case as is shown 
in Table EH, where the increase in the velocity of reaction 
is expressed by dividing the time taken to decompose one- 
half of the potassium permanganate by the time taken to 
decompose one-eighth. 
Table E. 
Acid cone. Temperature of experiment. 
oe, lage. 
58 N. 1:94 2°26 
FOG. 1:94 2°00 
These figures as well as those in Table D are very satis- 
factory and give added weight to the conclusions already 
drawn, namely that the velocity of reaction depends on the 
hydrogen ion concentration and that the nature of the 
reaction is independent of such concentration, the rate at 
which the velocity of reaction (k) increases, in any one 
experiment, being the same for any acid concentration, 
provided that it is not below the concentration necessary 
for the liberation of oxygen according to the equation: 
2KMnO, +3H,S8SO, = 2 MnSO, + K,SO, +3H,O0+50 
Influence of subsidiary reactions on the velocity of 
reactions. 
An examination of the figures for any of the experiments 
given in the foregoing section will show that the velocity 
of reaction is not constant but increases until the end point 
is reached. This may be explained by supposing that 
secondary reactions proceed, in which the products of 
decomposition of sucrose are further decomposed, or that 
some substance is formed which exerts an accelerative 
influence on the main reaction. 
One side reaction that must necessarily take place toa 
certain extent, is the inversion of sucrose by sulphuric acid, 
