The conjugate base of $HSO_3^-$ is ......

The conjugate base of hydrazoic acid is

For the species $HSO_4^{-}$ and $NH_3$,their conjugate acids respectively are

Identify the conjugate acid-base pair respectively from the following equilibrium reaction.
$HPO_{4(aq)}^{2-} + H_2O_{(\ell)} \rightleftharpoons PO_{4(aq)}^{3-} + H_3O_{(aq)}^{+}$

Identify the conjugate base in the following reaction: $H_2SO_4 + H_2O \rightleftharpoons H_3O^{+} + HSO_4^-$

An acid is a compound which furnishes ($Bronsted-Lowry$ concept):