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

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$Na_2CO_3$

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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.

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

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