Answer
- $H_2O$
Acid: $Br^-(aq) + H_2O(l) HBr(aq) + OH^-(aq)$
Base: $HCl(aq) + H_2O(l) Cl^-(aq) + H_3O^+(aq)$
- $HS^-$
Acid: $Br^-(aq) + HS^-(aq) HBr(aq) + S^{2-}(aq)$
Base: $HCl(aq) + HS^-(aq) Cl^-(aq) + H_2S(aq)$
-$H{CO_3}^-$
Acid: $Br^-(aq) + H{CO_3}^-(aq) HBr(aq) + {CO_3}^{2-}(aq)$
Base: $HCl(aq) + H{CO_3}^-(aq) Cl^-(aq) + H_2{CO_3}(aq)$
Work Step by Step
Amphiprotic are substances capable of acting as a base or as an acid, depending on the situation.
In this list $H_2O$, $HS^-$ and $H{CO_3}^-$ are the ones that have this capability.
