Write equations for the laboratory preparation of:
sodium sulphate using dilute sulphuric acid.

Explanation

To prepare sodium sulfate (Na2SO4) using dilute sulfuric acid (H2SO4) in the laboratory, we can follow these steps:

### Step 1: Identify the Reactants
We will use sodium hydroxide (NaOH) and dilute sulfuric acid (H2SO4) as our reactants.

### Step 2: Write the Unbalanced Chemical Equation
The unbalanced chemical equation for the reaction between sodium hydroxide and sulfuric acid is:
\[ \text{NaOH} + \text{H}_2\text{SO}_4 \rightarrow \text{Na}_2\text{SO}_4 + \text{H}_2\text{O} \]
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