Sodium reacts with oxygen to produce sodium oxide, which dissolves in water to form sodium hydroxide. On adding hydrochloric acid to the base solution, salt and water are produced. Write balanced chemical equations to represent all the reactions stated in the question.

Explanation

To solve the problem, we need to write balanced chemical equations for the reactions described in the question. Let's break it down step by step.

### Step 1: Reaction of Sodium with Oxygen
Sodium (Na) reacts with oxygen (O₂) to form sodium oxide (Na₂O).

**Unbalanced Equation:**
\[ \text{Na} + \text{O}_2 \rightarrow \text{Na}_2\text{O} \]

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