Write a balanced chemical equation
Action of sodium hydroxide solution on aluminium.

Explanation

To write a balanced chemical equation for the action of sodium hydroxide (NaOH) on aluminum (Al), we need to follow these steps:

### Step 1: Identify the Reactants and Products
The reactants are aluminum (Al) and sodium hydroxide (NaOH). The products of the reaction are sodium aluminate (NaAlO2) and hydrogen gas (H2).

### Step 2: Write the Unbalanced Equation
The unbalanced equation for the reaction can be written as:
\[ \text{Al} + \text{NaOH} + \text{H}_2\text{O} \rightarrow \text{NaAlO}_2 + \text{H}_2 \]
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