Answer
Hydrogen carbonate** $(HC{O_3}^-)$ is the conjugate partner of $C{O_3}^{2-}$;
** Normally, you will find it as bicarbonate
Work Step by Step
1. Identify if the substance is an acid or a base (or both):
- $C{O_3}^{2-}$ is a base.
2. Since $C{O_3}^-$ is a base, add one proton to it:
- Add one hydrogen and sum one to the charge:
$C{O_3}^{2-} -- \gt HC{O_3}^-$
- This is the conjugate acid of $C{O_3}^{2-}$.
3. Name it:
$C{O_3}^{2-}$: Carbonate ion.
$HC{O_3}^-$ = $H^+$ + $C{O_3}^{2-}$; Therefore:
- Hydrogen carbonate.
** The most common name for it is "bicarbonate", but the IUPAC name is hydrogen carbonate.
