( 624 ) 
As the average of both series we, therefore, find k= 6,86 at 25°. 
By way of comparison we may put the figures of ARRHENIUS 
and Spour side by side: 
Arruenivs') found at 24°.7 (N./,, ethyl acetate + N /49 NaOH) 6.45 and 6.59 aver. 6.52 
SPOHR 2) found at 25°.0 (N./,, ethyl acetate + N./,, NaOH) 6.51 
The found figure 6.86 at 25°.0 agrees very well with ARRHENIUS’ 
figure 6.52 at 24°.7, if we consider that a difference in temperature 
of 0°.3 already influences the velocity of the reaction to the extent 
of about 6 pCt. °). 
Tih BLE AIN: 
N./4 ethyl acetate + N/,, NaOH + N./; saccharose. 
First serie. Second series. 
t Cu kC, t Cu kC, 
10 6.43 — 10 6.45 — 
15 5.51 0.0333 15 5.55 0.0524 
20 4.85 326 k=2,03 20 4.90 316 k=1,99 
25 4.30 350 25 4.38 315 
35 3.58 318 35 3.53 330 
average 0.0327 — average 0.0321 — 
FE ASB sks. Ne 
N./,9 ethyl acetate + N./,, Na Ol + N./,9 saccharose. 
First series. Second series. 
t Cn kC, t Cn kC, 
5 6.91 — 5 6.81 — 
10 5.45 0.0535 10 5.40 0.0525 
15 4.47 545 k= 3,14 15 4.45 530 k=3,10 
20 3.81 542 20 3.78 534 
25 3.30 547 25 3.33 522 
average 0.0542 average 0.0528 
') Arruentus, Zeitschrift für phys. Chemie 1. 112 (1887). 
*) Spour, ibid 2. 194 (1888). 
3) Studien zur chemischen Dynamik S, 129. 
