Question

What happens when a small piece of sodium reacts with water?

Answer 1

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Here's your answer !!  

Sodium is a highly reactive alkali metal. That means it has a single electron in its outer shell which is readily lost in reactions, resulting in a much more stable, complete outer electron shell. When sodium comes in contact with water, hydrogen gas is liberated and sodium hydroxide is generated that dissolved in the water. The reaction proceeds as follows: 2Na + 2H2O ==> 2NaOH + H2(gas).

The reaction is strongly exothermic, and the heat generated ignites the hydrogen gas.

A small piece of sodium will dance on the surface of water with a hydrogen flame under and around it. A large piece of sodium can sink below the surface of the water, releasing a large amount of hydrogen and heat, resulting in a steam explosion that exposes the hydrogen gas to the atmosphere, where it will also likely exolode.

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