Write a balanced chemical equation of the reaction involved in the preparation of ethene in the laboratory.

Explanation

To write a balanced chemical equation for the preparation of ethene in the laboratory, we need to follow these steps:

### Step 1: Identify the reactants
The main reactant in this reaction is ethanol (C₂H₅OH). We also need dilute sulfuric acid (H₂SO₄) as a catalyst.

### Step 2: Write the unbalanced equation
The unbalanced equation for the reaction can be written as:
\[ \text{C}_2\text{H}_5\text{OH} + \text{H}_2\text{SO}_4 \rightarrow \text{C}_2\text{H}_4 + \text{H}_2\text{O} \]
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