Which one of the following is a Bronsted acid | vedclass

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Question

(A) According to the Bronsted-Lowry concept,an acid is a proton $(H^+)$ donor and a base is a proton acceptor.$A$. $H_2S$ can donate a proton to form

Vedclass · Accepted Answer

$H_2S$

Vedclass · Answer

(A) According to the Bronsted-Lowry concept,an acid is a proton $(H^+)$ donor and a base is a proton acceptor.$A$. $H_2S$ can donate a proton to form $HS^-$,but it cannot accept a proton to form $H_3S^+$. Thus,it acts only as a Bronsted acid.$B$. $H_2O$ can donate a proton to form $OH^-$ and accept a proton to form $H_3O^+$. Thus,it is amphoteric.$C$. $HCO_3^-$ can donate a proton to form $CO_3^{2-}$ and accept a proton to form $H_2CO_3$. Thus,it is amphoteric.$D$. $NH_3$ can accept a proton to form $NH_4^+$,but it does not act as a Bronsted acid in aqueous solution. Thus,it acts only as a Bronsted base.Therefore,$H_2S$ is a Bronsted acid but not a Bronsted base.

Which one of the following is a Bronsted acid but not a Bronsted base?

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