Describe the preparation of potassium permanganate. How does the acidified permanganate solution react with (i) iron(II) ions (ii) `SO_(2)` and (iii) oxalic acid? Write the ionic equations for the reactions.

Explanation

### Step-by-Step Text Solution

**Preparation of Potassium Permanganate (KMnO4):**

1. **Starting Material**: The preparation of potassium permanganate begins with the mineral pyrolusite, which is primarily composed of manganese dioxide (MnO2).

2. **Fusing with Potassium Hydroxide**: The pyrolusite is fused with potassium hydroxide (KOH) in the presence of oxygen. This reaction occurs upon heating.

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