Which acid is not an Arrhenius acid?

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Question

(C) An Arrhenius acid is a substance that increases the concentration of $H^+$ ions in aqueous solution.$HNO_3$,$HClO_4$,and $H_3PO_4$ are strong or m

Vedclass · Accepted Answer

$H_3BO_3$

Vedclass · Answer

(C) An Arrhenius acid is a substance that increases the concentration of $H^+$ ions in aqueous solution.$HNO_3$,$HClO_4$,and $H_3PO_4$ are strong or moderate acids that dissociate to release $H^+$ ions directly.$H_3BO_3$ (Boric acid) is a Lewis acid. It does not dissociate to give $H^+$ ions in water; instead,it accepts an $OH^-$ ion from water to form $[B(OH)_4]^-$ and releases $H^+$ ions from the water molecule itself.Therefore,$H_3BO_3$ is not an Arrhenius acid in the classical sense as it does not contain ionizable $H^+$ protons.

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