What are the limitations of Arrhenius acid-base theory ?

1.	What are the limitations of Arrhenius acid-base theory ?
Answer» Limitations of Arrhenius theory : 1. This theory is applicable only for aqueous solutions and not for non-aqueous solutions. 2. It fails to explain the acidic nature of non-hydrogen compounds like BF₃, AlCl₂, FeCl₃, etc. 3. It fails to explain the basic nature of non-hydroxy compounds like NH₃, amines, Na₂CO₃, KCN, aniline, etc. in their aqueous solutions. 4. It does not explain role of solvent or existence of H₃O⁺ in an aqueous solution of an acid.

Answer»

Limitations of Arrhenius theory :

1. This theory is applicable only for aqueous solutions and not for non-aqueous solutions.

2. It fails to explain the acidic nature of non-hydrogen compounds like BF₃, AlCl₂, FeCl₃, etc.

3. It fails to explain the basic nature of non-hydroxy compounds like NH₃, amines, Na₂CO₃, KCN, aniline, etc. in their aqueous solutions.

4. It does not explain role of solvent or existence of H₃O⁺ in an aqueous solution of an acid.

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