OXIDATION OF SUCROSE BY POTASSIUM PERMANGANATE. 231 
In the following table are given the velocities at which 
the reaction proceeded for various concentrations of sul- 
phuric acid, when one eighth of the total permanganate 
had been decomposed. The initial and final velocities are 
also included in order to give a more general idea of the 
influence of the acid concentration. 
Table A.—Influence of the acid concentration on the velocity of 
reaction at 5° C. 
Acid cone. Velocity of reaction (second order constants). 
One-eighth. Initial. Final. 
“29 N. 0000026 °0000017 0000043 
“DS ,, "0000033 *0000018 "0000129 
EPG: 5; "0000054 "0000091 "0000374 
Table B.—Jnfluence of the acid concentration on the velocity of 
reaction at 15° C. 
Acid cone. Velocity of reaction (second order constants). 
One-eighth. Initial. Final. 
"058 N. ‘0000034 "00000046 "000007 1 
oe, “0000039 "00000070 “0000119 - 
“29. 5, "0000050 "0000012 "0000206 
ao |; "000010 000008 "0000412 
£1695; ‘000016 000021 "0000860 
At 15° C. the effect of increasing the acid concentration 
is to increase the velocity constant at all stages to roughly 
the same extent, and to increase the final rate to almost 
exactly the same extent. This is especially so with the 
higher acid concentrations, the figures referred to being :— 
Acid cone. Velocity (4) near end-point. 
“29 N. "000021 
DOI |} ‘000041 
TG, 3; "000086 
The inference drawn from these experiments was that 
the velocity of reaction depended directly upon the hydrogen 
ion concentration, but that the nature of the reaction was 
little changed by varying that concentration. In order to 
