Acids and bases (A-level only)

In the following aqueous equilibrium:

\text{HCO}_3^{-}(\text{aq}) + \text{HSO}_4^{-}(\text{aq}) \rightleftharpoons \text{H}_2\text{CO}_3(\text{aq}) + \text{SO}_4^{2-}(\text{aq})

which pair contains only species that behave as Brønsted–Lowry bases?

$HCO3−\text{HCO}_3^{-}$ and $SO42−\text{SO}_4^{2-}$

$HSO4−\text{HSO}_4^{-}$ and $H2CO3\text{H}_2\text{CO}_3$

$HCO3−\text{HCO}_3^{-}$ and $H2CO3\text{H}_2\text{CO}_3$

$HSO4−\text{HSO}_4^{-}$ and $SO42−\text{SO}_4^{2-}$

In the following aqueous equilibrium:

\text{HCO}_3^{-}(\text{aq}) + \text{HSO}_4^{-}(\text{aq}) \rightleftharpoons \text{H}_2\text{CO}_3(\text{aq}) + \text{SO}_4^{2-}(\text{aq})

which pair contains only species that behave as Brønsted–Lowry bases?

$HCO3−\text{HCO}_3^{-}$ and $SO42−\text{SO}_4^{2-}$

$HSO4−\text{HSO}_4^{-}$ and $H2CO3\text{H}_2\text{CO}_3$

$HCO3−\text{HCO}_3^{-}$ and $H2CO3\text{H}_2\text{CO}_3$

$HSO4−\text{HSO}_4^{-}$ and $SO42−\text{SO}_4^{2-}$

Acids and bases (A-level only) Questions