- Vigorous reaction: The sodium metal reacts vigorously with water, producing a hissing sound and releasing a large amount of heat.

- Formation of sodium hydroxide: The reaction between sodium and water produces sodium hydroxide (NaOH), a strong base. This can be observed by the formation of bubbles of hydrogen gas, which rises to the surface of the water.

- Exothermic reaction: The reaction is exothermic, meaning that it releases heat. This can be felt by touching the beaker or by observing the steam rising from the reaction.

- Formation of sodium and hydrogen gas: The overall reaction can be represented as: 2Na(s) + 2H2O(l) → 2NaOH(aq) + H2(g)

- Safety precautions: Sodium reacts violently with water, so it is important to take safety precautions when working with it. These precautions include wearing protective clothing, such as gloves and goggles, and working in a well-ventilated area.

Explanation:

- The reaction between sodium and water is a classic example of a single-displacement reaction, where one element replaces another in a compound. In this case, sodium replaces hydrogen in water to form sodium hydroxide and hydrogen gas.

- The reaction is highly exothermic because the bonds formed in sodium hydroxide are stronger than the bonds broken in water. The energy released in the reaction appears as heat.

- The hydrogen gas produced in the reaction is highly flammable, so it is important to take precautions to prevent it from igniting.