Reaction of Citric Acid with Potassium Permanganate Solution

In this reaction, citric acid reacts with potassium permanganate solution to produce various products.

1. Oxidation of Citric Acid
When citric acid is added to potassium permanganate solution, it acts as a reducing agent. The potassium permanganate undergoes reduction, while citric acid undergoes oxidation.

2. Formation of Manganese Dioxide
As a result of the reaction, manganese dioxide is formed. This can be observed as a brown precipitate in the solution.

3. Color Change
Potassium permanganate solution is purple in color, while citric acid is colorless. When citric acid is added to the potassium permanganate solution, the purple color of the solution fades away due to the reduction of potassium permanganate.

4. Evolution of Carbon Dioxide Gas
During the reaction, carbon dioxide gas is evolved. This can be observed as bubbles forming in the solution.

5. Overall Reaction
The overall reaction can be represented as follows:
3KMnO4 + 4H3C6H5O7 → 3MnO2 + 12CO2 + 2K3C6H5O7 + 2H2O

This reaction is a redox reaction where citric acid is oxidized, and potassium permanganate is reduced. The products formed include manganese dioxide, carbon dioxide, and potassium citrate.

In conclusion, when citric acid is added to potassium permanganate solution, it results in the oxidation of citric acid, formation of manganese dioxide, color change in the solution, evolution of carbon dioxide gas, and the overall redox reaction between the two compounds.