Which of the following species is an acid and | vedclass

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(A) species that can act as both an acid and a conjugate base is called an amphoteric species.$H_2SO_4$ acts as an acid and dissociates as follows: $H

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$HSO_4^-$

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(A) species that can act as both an acid and a conjugate base is called an amphoteric species.$H_2SO_4$ acts as an acid and dissociates as follows: $H_2SO_4 \rightleftharpoons H^{+} + HSO_4^-$.Here,$HSO_4^-$ is the conjugate base of $H_2SO_4$.However,$HSO_4^-$ can further lose a proton to act as an acid: $HSO_4^- \rightleftharpoons H^{+} + SO_4^{2-}$.Therefore,$HSO_4^-$ is both a conjugate base (of $H_2SO_4$) and an acid (which forms $SO_4^{2-}$).

Which of the following species is an acid and also a conjugate base of another acid?

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