Arrhenius Concept

Utility of Arrhenius concept:

The Arrhenius concept of acids and bases was able to explain a number of phenomenon like neutralization, salt hydrolysis, strength of acids and bases etc.

Limitations of Arrhenius concept

(a) For the acidic or basic properties, the presence of water is absolutely necessary. Dry  shall not act as an acid.  is regarded as an acid only when dissolved in water and not in any other solvent.

(b) The concept does not explain acidic and basic character of substances in non-aqueous solvents.

(c) The neutralisation process is limited to those reactions which can occur in aqueous solutions only, although reactions involving salt formation do occur in absence of solvent.

(d) It cannot explain the acidic character of certain salts such as  in aqueous solution.

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