Among CO_3^{2-},OH^{-},NH_3 and HCO_3^{-},the | vedclass

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(D) Bronsted acid is a species that can donate $H^{+}$ ions,and a Bronsted base is a species that can accept $H^{+}$ ions.$HCO_3^{-}$ can act as both:

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$HCO_3^{-}$

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(D) Bronsted acid is a species that can donate $H^{+}$ ions,and a Bronsted base is a species that can accept $H^{+}$ ions.$HCO_3^{-}$ can act as both:$HCO_3^{-} + H^{+} \rightleftharpoons H_2CO_3$ (Acting as a Bronsted base)$HCO_3^{-} \rightleftharpoons H^{+} + CO_3^{2-}$ (Acting as a Bronsted acid)Such species are known as amphoteric species.

Among $CO_3^{2-}$,$OH^{-}$,$NH_3$ and $HCO_3^{-}$,the species that acts as a Bronsted acid as well as a Bronsted base,is

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