Explain why does colour of `KMnO_(4)` disappear when oxalic acid is added to its solution in acidic medium?

Explanation

To explain why the color of KMnO4 disappears when oxalic acid is added to its solution in an acidic medium, we can break down the explanation into a few steps:

### Step 1: Understanding KMnO4
- Potassium permanganate (KMnO4) is a strong oxidizing agent and has a deep purple color due to the presence of the permanganate ion (MnO4^-).

### Step 2: Reaction with Oxalic Acid
- When oxalic acid (C2O4^2-) is added to an acidic solution containing KMnO4, a redox reaction occurs. In this reaction, the oxalic acid acts as a reducing agent.

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