What is solvent system concept of acid and
base ? Write auto-ionization of NH, and give
examples of ammono acids and ammono bases
Answers
answer of first part
In the solvent-system definition, a solute which increases the concentration of the cation generated by autoionisation of the solvent is called an acid, and a solute which increases the concentration of the anion generated by autoionisation of the solvent is called a base.
answer of second part
Molecular autoionization (or self-ionization) is a reaction between molecules of the same substance to produce ions. If a pure liquid partially dissociates into ions, it is said to be self-ionizing. In most cases the oxidation number on all atoms in such a reaction remains unchanged. Such autoionization can be protic (H+transfer), or non-protic.
examples -
Protic solvents
Protic solvents often undergo some autoionization:
2 H
2O ⇌ H
3O+
+ OH−
The self-ionization of water is particularly well studied, due to its implications for acid-base chemistry of aqueous solutions.
2 NH
3 ⇌ NH+
4 + NH−
2 [1]:217
2 H
2SO
4 ⇌ H
3SO+
4 + HSO−
4 [1]:223
3 HF ⇌ H
2F+
+ HF−
2 [1]:221 Here proton transfer between two HF combines with homoassociation of F−
and a third HF to form HF−
2.