the-ion-hco3-aq-can-act-as-an-acid-or-a-base-in-water-a-write-the-reaction-for-i
(a).
##HCO_(3(aq))^(-)+H_((aq))^+rarrH_2CO_(3(aq))##
(b).
##HCO_(3(aq))^(-)rarrCO_(3(aq))^(2-)+H_((aq))^(+)##
The Lowry Bronsted theory describes an acid as a proton donor and a base as a proton acceptor.
On this basis you can see in (a) it is acting as a base and in (b) it is acting as an acid.
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