The theory of ionization was given by:

Which one is the weakest acid?

The ionization constants of two bases $AOH$ and $BOH$ are $K_{b1}$ and $K_{b2}$ respectively. Their relationship is $pK_{b1} < pK_{b2}$. Which of the following does not represent the base with the highest $pH$?

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

In the following reactions,$ZnO$ is respectively acting as a/an:

In the reaction $NH_4^+ + S^{2-} \rightarrow NH_3 + HS^-$,what are $NH_3$ and $HS^-$ with respect to the $NH_4^+$ and $S^{2-}$ species?