JEE MAIN - Chemistry (2002 - No. 7)
Species acting as both Bronsted acid and base is :
(HSO4)-1
Na2CO3
NH3
OH-1
Explicação
$${\left( {HS{O_4}} \right)^ - }\,\,\,$$ can accept and donate a proton
$${\left( {HS{O_4}} \right)^ - } + {H^ + } \to {H_2}S{O_4}\,\,\,$$ (acting as base)
$${\left( {HS{O_4}} \right)^ - } - {H^ + } \to {H_2}S{O_4}^{2 - }.\,\,\,$$ (acting as acid)
$${\left( {HS{O_4}} \right)^ - } + {H^ + } \to {H_2}S{O_4}\,\,\,$$ (acting as base)
$${\left( {HS{O_4}} \right)^ - } - {H^ + } \to {H_2}S{O_4}^{2 - }.\,\,\,$$ (acting as acid)