ACKNOWLEDGEMENT:
Figure
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Source of Figure
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Figure 18
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http://classroom.synonym.com/
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Preparation of Ethanoic acid:
Ethanoic acid is formed by the oxidation of ethanol. This
oxidation may be by:
- Atmospheric oxygen
- Acidified potassium manganate
Oxidation of Ethanol
by atmospheric oxygen:
Oxygen oxidizes ethanol to ethanoic acid, according to the
following equation.
This partial formation of ethanoic acid in ethanol, causes
wines to bitter. Therefore, ethanol should not be left exposed to atmospheric
oxygen, for long periods of time.
Oxidation by
Potassium Manganate:
Potassium Manganate is an oxidizing agent and it oxidizes
ethanol to ethnoic acid, according to the following equation.
The oxidation state of manganese in manganate, decreases from
+7 to +2 and this decolourizes the potassium manganite solution from magenta to
colourless.
Figure 18:
