Derive the formulae of the following compound Ferrous sulphate.

Explanation

To derive the formula for ferrous sulphate, follow these steps:

### Step 1: Identify the ions present in ferrous sulphate
- Ferrous sulphate consists of ferrous ions and sulphate ions.
- The ferrous ion is represented as \( \text{Fe}^{2+} \).
- The sulphate ion is represented as \( \text{SO}_4^{2-} \).

### Step 2: Write down the charges of the ions
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