Question

What happens when a piece of sodium is dropped in water?

Answer 1

Answer:

Explanation:

Sodium is a highly reactive alkali metal. ... 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).

Answer 2

When a piece of Sodium is dropped in water it reacts vigorously with it due to its highly reactive nature. The reaction is as follows:

$2Na+2H_{2} O \rightarrow2NaOH+H_{2}$

• Out of all the groups in the periodic table Sodium (Na) belongs to Group I called the alkali metals.
• Alkali metals are known to be exceedingly reactive in nature and are univalent which means they have a single electron in their valence shell which when donated will attain a stable gas configuration, thus belonging to Group I.
• This makes them electropositive in nature and as we move down the group, their reactivity increases with a decrease in the ionization enthalpy.
• The size of Sodium atom is greater than that of Lithium making it more reactive.
• The reason being that, with a decrease in the ionization enthalpy and increase in the size of the atom down the group, the reactive nature is said to increase.
• This is the reason why Sodium reacts vigorously with water as its reactivity towards ions like hydroxide which is present in water is high.
• The reaction results in the Sodium ion to replace the Hydrogen ion as given in the reaction below:

                                            $2Na+2H_{2} O \rightarrow2NaOH+H_{2}$

• The reaction is an exothermic one which means that it releases heat by producing hydrogen gas as a result.
• As soon as Sodium comes in contact with water it catches fire and ignites with a yellow flame indicating that the reaction is exothermic in nature.
• This occurs also due to the property that Sodium has a very low melting point. However, no explosion occurs.

https://brainly.in/question/22733834

https://brainly.in/question/8192640

SPJ3