Sodium fire in the laboratory should not be extinguished by using water. Why ?

Explanation

To understand why sodium fire in the laboratory should not be extinguished using water, we can break down the explanation into several steps:

### Step-by-Step Solution:

1. **Understanding Sodium Fire**: Sodium is an alkali metal that can ignite spontaneously in the presence of moisture or water. When sodium catches fire, it burns with a bright yellow flame.

2. **Reaction of Sodium with Water**: When sodium reacts with water, it undergoes a chemical reaction. The balanced chemical equation for this reaction is:
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