Choosing only substances from the list given in the box below, write equations for the reactions which you would use in the laboratory to obtain:
(i) Sodium sulphate
(ii) Copper sulphate
(iii) Iron
(iv) Zinc carbonate
Dilute sulphuric acid, Copper, Iron, Sodium, Zinc, Copper carbonate, Sodium carbonate

Explanation

To solve the question, we need to write chemical equations for the reactions that produce the specified compounds using the substances provided. Here are the step-by-step solutions for each compound:

### (i) Sodium Sulphate (Na₂SO₄)
1. **Identify the reactants**: We can use dilute sulphuric acid (H₂SO₄) and sodium carbonate (Na₂CO₃).
2. **Write the reaction**:
\[ \text{Na}_2\text{CO}_3 + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + \text{H}_2\text{CO}_3 \]
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