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Sagot :
Answer:
[tex]\boxed{\boxed{\pink{\bf \leadsto This \ is \ an \ example \ of \ Chemical \ change .}}}[/tex]
Explanation:
Reaction of sodium metal with water is a chemical change . Sodium reacts with water to form sodium hydroxide. This is also an example of exothermic reaction as heat is released in this process. Sodium reacts vigoursly with water , it even reacts with the moisture present in the air . So it is stored in kerosene oil .
The reaction of sodium with water is :-
[tex]\boxed{\red{ \bf \underset{\blue{Sodium}}{2Na} + \underset{\blue{Water}}{2H_2O} \longrightarrow \underset{\blue{Sodium\: Hydroxide}}{2Na(OH)}+ \underset{\blue{Hydrogen}}{H_2}}}[/tex].
The reaction of sodium metal with water is a chemical change, as a result formation of sodium hydroxide occurs.
- A Chemical change is any change that occurs to substances which when combine to form a new substance or decompose to form new substances. Here there occurs an internal consistency of the matter involved in that particular change.
- A physical change is a change with involves the changes in the size, shape, texture, etc. of any substance.
The following points to be noted for the reaction of sodium with water:
- The sodium reacts with water to give sodium hydroxide.
- The presence of the single outermost electron (3s1) in sodium makes the metal highly reactive.
- This is a chemical change which is an exothermic reaction, which means the reaction results in the liberation of heat during the process.
- Sodium is a very highly reactive metal, which can even react with moisture present in the air.
- To avoid any unnecessary reactions, sodium is stored in kerosene, where it seems to be inert.
Therefore, the reaction of sodium with water is a chemical change.
Learn more about sodium:
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