Question

Motion of a piece of sodium on water

Answer 1

Answer:

Explanation:

It burnes and moves because of force which has acted on it

Answer 2

Motion of a piece of Sodium metal on water:

Sodium will react with water and will form heat.

• A small piece of sodium on the water surface will be moving on the surface of the water with hydrogen flame formed by reaction of the sodium metal with water.
• A large piece of sodium may sink below and will release a large amount of heat and hydrogen. The presence of hydrogen may increase the flame and as a result, a steam explosion may happen.

The reaction of Sodium metal with water is exothermic. Sodium is a very reactive metal due to the presence of 1 electron in its valence shell.

 The reaction is:

              Na + H₂O → NaOH + H₂