Chemistry Reference
In-Depth Information
9.9 Other Associable Experiments and Concepts
The PIN-Concept is based on many interrelated experiments ([
1
], Chap. 27). Only
some of them can be conducted in any given teaching and learning situation. This is
not disadvantageous, because the modular design of the PIN-Concept allows
various combinations without losing the overall context. Furthermore, the experi-
mental possibilities are not exhausted at all through this pool of experiments. Since
the PIN-Concept is build on system genesis and system growth it offers many
opportunities for the integration or association of further experiments. These can be
found in chemistry educational literature and add to the PIN-Concept beyond the
context of their original intention. Experiments that can be integrated into the net of
fundamental organic substances (Figs.
9.5
,
9.12
and
9.15
) are of particular interest.
The following are stated exemplarily:
Fig. 9.14
Interpretation of the acetic acid syntheses on a molecular level [
6
]. Compare with
Fig.
9.13
. Acetal is first hydrolyzed into acetaldehyde and ethanol, and ethyl acetate into acetic
acid and ethanol. The hydrolysis products are then oxidized into acetic acid. Ethanol is first
oxidized into acetaldehyde, and lactic acid into pyruvic acid
