Which of the following compounds cannot act a | vedclass

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(B) $Br\o nsted$ acid is a proton $(H^+)$ donor,and a $Br\o nsted$ base is a proton $(H^+)$ acceptor. Compounds that can act as both are called amphot

Vedclass · Accepted Answer

$Na_2CO_3$

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(B) $Br\o nsted$ acid is a proton $(H^+)$ donor,and a $Br\o nsted$ base is a proton $(H^+)$ acceptor. Compounds that can act as both are called amphoteric. $HSO_4^-$ can donate a proton to form $SO_4^{2-}$ and accept a proton to form $H_2SO_4$. $NH_3$ can donate a proton to form $NH_2^-$ and accept a proton to form $NH_4^+$. $HCO_3^-$ can donate a proton to form $CO_3^{2-}$ and accept a proton to form $H_2CO_3$. $Na_2CO_3$ dissociates into $2Na^+$ and $CO_3^{2-}$. The $CO_3^{2-}$ ion can only accept a proton to form $HCO_3^-$ or $H_2CO_3$; it cannot donate a proton because it has no hydrogen atoms. Therefore,$Na_2CO_3$ cannot act as a $Br\o nsted$ acid.

Species	Conjugate acid
$ (a) NH_{3} $	$ (i) H_{2}CO_{3} $
$ (b) HCO_{3}^{-} $	$ (ii) H_{3}O^{+} $
$ (c) H_{2}O $	$ (iii) NH_{4}^{+} $
$ (d) HSO_{4}^{-} $	$ (iv) H_{2}SO_{4} $

Which of the following compounds cannot act as both a $Br\o nsted$ acid and a $Br\o nsted$ base?

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