cady and elseys concept of an acid and base
Answers
Answer:
Explanation:
General theory Of solvent System:
In an attempt to have more general definition of acids and bases applicable to protonic and non protonic solvents, several definitions havebeen proposes. One given by Cady and Elsey (1938), according to which an acid is a solute that, either by direct dissociation or by reaction with the solvent gives the anion characteristics of the solvent and a base is a solute thateither by direct association or by reaction with the solvent gives the cation characteristics of the solvent.
Utility of the Concept:
Evidently this concept of solvent system can be used to explain the acid-base reactions occuring in aqueous solvents (protonic and non-protonic both).
Limitations:
* This theory doesnot consider a number of acid base reactions included in the protonic definition.
* It limits acid-base phenomena to solvent systems only.
* It cannot explain the neutralization reactions occuring without the presence of ions.
Thus, the theory can simply be said to be an extention of the Arrhenius water ion system.
Answer:
Cady and Elsey developed the concept of solvent system or auto-ionization system of acid and base.
Explanation:
The solvent system was firstly introduced by Franklin in 1905 and later on was extended by Cady-Esley in 1928. The definition of acids and bases given by this concept can be applied for both protic and non-protic solvents.
According to solvent system, the solvents undergo self-ionization and give cations and anions. Cations released are called solvent cations whereas anions are called solvent anions.
The substances which gives solvent cations when dissolved in that solvent are called acids whereas substances which give solvent anions when dissolved in that solvent are called bases.
Hence, solvent cations are also called acid cations and solvent anions are called as base anions.
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