The [tex]K_a[/tex] for formic acid will be 1.86×[tex]10^{-4}[/tex].
Any solution where the solvent is water (H2O) is referred to as an aqueous solution. When a species' name appears in a chemical equation, the symbol (aq) is used to denote that the species is in an aqueous solution.
Despite being frequently referred to as the universal solvent, only hydrophilic compounds dissolve in water. Acids, bases, and many salts are examples of hydrophilic molecules. Hydrophobic substances tend to not form aqueous solutions and do not dissolve well in water. Several organic compounds, such as fats and oils, are examples.
According to the question,
HCOOH ⇄ [tex]H^{+}[/tex] + [tex]HCOO^{-}[/tex]
[[tex]H^{+}[/tex]] [tex]10^{-1.98}[/tex]
=0.0104713
Now,
I 0.60 0 0
C -x +x +x
E 0.60-x x x
[tex]K_a[/tex]= x²/(0.60-x)
Here,
x=0.0104713
[tex]K_a[/tex]=(0.0104713)²/(0.60-0.0104713)
[tex]K_a[/tex]=1.86×[tex]10^{-4}[/tex]
Hence, the [tex]K_a[/tex] for formic acid will be 1.86×[tex]10^{-4}[/tex].
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