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Ionic Equilibria — Chemistry STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceChemistryIonic Equilibria2 Marks
Question
What are the limitations of Arrhenius acid-base theory ?
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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 $BF _3, AlCl _2, FeCl _3$, etc.
3. It fails to explain the basic nature of non-hydroxy compounds like $NH _3$, amines, $Na _2 CO _3$, $KCN$, aniline, etc. in their aqueous solutions.
4. It does not explain role of solvent or existence of $H _3 O ^{+}$in an aqueous solution of an acid.

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