Example of Metal Reaction with Water
One of the most notable reactions is that of sodium (Na) with water (H₂O). When sodium is introduced to water, it reacts vigorously, producing sodium hydroxide (NaOH) and hydrogen gas (H₂).

Reaction Equation
The chemical equation for this reaction is:
\[
2 \, \text{Na} (s) + 2 \, \text{H}_2\text{O} (l) \rightarrow 2 \, \text{NaOH} (aq) + \text{H}_2 (g)
\]

Details of the Reaction
- **Initial Contact**: Upon contact with water, sodium begins to melt due to the heat generated by the reaction.
- **Formation of Bubbles**: The reaction produces hydrogen gas, which forms bubbles that can be seen escaping from the surface.
- **Exothermic Reaction**: This reaction is exothermic, meaning it releases heat, sometimes enough to ignite the hydrogen gas.
- **Sodium Hydroxide Production**: Sodium hydroxide, a strong base, is formed in solution, making the water alkaline.

Safety Considerations
- **Vigor and Heat**: The vigorous nature of this reaction can lead to explosions if the hydrogen gas ignites.
- **Protective Measures**: Always handle sodium with care, using appropriate safety gear and conducting experiments in controlled environments.

Conclusion
The reaction of metals, particularly alkali metals like sodium, with water is a classic example of a chemical reaction showcasing the reactivity of metals. Understanding these reactions is crucial in chemistry, especially in studying metal properties and their behavior in various environments.

Metals reacts with water to form hydrogen gas..