Basic chemistry

What is Lewis acids and bases give examples?

Lewis concept of acid and bases

 

Lewis acids and bases examples:

Lewis acids and bases examples are listed below.A  broader acid and base theory was proposed by American physical chemist Gilbert Newton Lewis in 1923.

In the Lewis theory,

Bases:

Bases are defined as electron-pair donors

Acids:

Acids as electron-pair acceptors.

Acid base reactions:

Acid-base reactions involve the combination of the Lewis acid and base through sharing of the base’s electron pair.

Lewis acids and bases example:

Ammonia is an example of a Lewis base.  Electrons pair located on the nitrogen atom may be used to form a chemical bond to a Lewis acid such as boron trifluoride (BF3).

(In the following equation, the colon represents an electron pair.)

H3N: + BF3 → H3N― BF3.

Coordination compounds:

Water,ammonia and many other Lewis bases react with metal ions to form a group of species known as coordination compounds.

The reaction to form these species is another example of a Lewis acid-base reaction.

For example, the light blue colour of a solution of Cu2+ ions in water is due to the [Cu(H2O)6]2+ ion.

If ammonia is added to this solution, the water molecules attached to copper are replaced by ammonia molecules, and the beautiful deep blue ion [Cu(NH3)4]2+ is formed.

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