Ionization reaction gives the ionization state of the chemical species. Its ionization will result in a conjugate base of the formic acid and release a hydrogen ion.
The acid dissociation constant is the concentration of the acid that has been dissociated into its constituents ions in the solution.
The ionization equation of the formic acid is:
[tex]\rm HCOOH \rightleftharpoons HCOO^{-} + H^{+}[/tex]
The acid dissociation constant (Ka) for formic acid is given as,
[tex]\rm Ka = \rm \dfrac {[H^{+}][HCOO^{-}]}{[HCOOH]}[/tex]
Anions are negatively charged ions and formate ions generated in the dissociation of the formic acid.
Therefore, the formate ion is an anion.
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