Description of experiment
Below follows a plain text transcript of the selected experiment.
Needed compounds:
-----------------
succinic acid : HOOC CH2 CH2 COOH
oxalic acid : HOOC COOH . 2H2O
sulphuric acid : H2SO4
potassium permanganate : KMnO4
Class:
------
elem=Mn
redox
Summary:
--------
Potassium permanganate easily oxidizes oxalic acid. Succinic acid is not
oxidized easily.
Description:
------------
Add an excess amount of succinic acid to a solution of KMnO4 and heat to
appr. 60 C: The permanganate is reduced, but not completely. The liquid
turns purple/red and a little bit turbid.
Add some sulphuric acid (appr. 15% by weight): No visible changes.
Add an excess amount of oxalic acid: Evolution of a gas, the liquid
becomes clear and colorless.