What happens when sodium reacts rapidly with cold water?

Explanation

**Step-by-Step Solution:**

1. **Identify the Reactants**: The reaction involves sodium (Na), which is a highly reactive metal, and cold water (H2O).

2. **Chemical Reaction**: When sodium comes into contact with cold water, a chemical reaction occurs. This reaction can be represented by the following equation:
\[ 2 \text{Na} + 2 \text{H}_2\text{O} \rightarrow 2 \text{NaOH} + \text{H}_2 \]
...