Physical Chemistry 3: — Chemical Kinetics — - Christian-Albrechts ...

1.3 Historical events 5
1.3 Historical events
I Sucrose inversion reaction (Wilhelmy, 1850): Kinetic investigation of the H + catalyzed
hydrolysis of sucrose by monitoring the change as function of time of the optical
activity of the solution from reactant (sucrose) to products (glucose and fructose). 11
I
Table 1.1: Optical activity parameters for the sucrose inversion reaction.
C 12 H 22 O 11 +H 2 O −→ C 6 H 12 O 6 + C 6 H 12 O 6
sucrose glucose fructose
(1 M) ) +665 ◦ — +520 ◦ −920 ◦
(1 M) ) Ø =+665 ◦ Ø = −200 ◦
) (1 M) =specific angle of rotation of a 1 M solution at (Na-D).
I
Figure 1.1: Observed concentration-time profile of sucrose.
11 This experiment is carried out in the Physical Chemistry Lab Course 1 at CAU (“Grundpraktikum”).