In the complete ionic equation below

CHEMISTRY · Single correct · A Level · Chemistry · Reactions of ions in aqueous solution · Reactions of ions in aqueous solution

Problem

In the complete ionic equation below, which pair of ions are spectator ions?

\text{Ba}^{2+}(aq) + 2\,\text{Cl}^-(aq) + 2\,\text{K}^+(aq) + \text{SO}_4^{2-}(aq) \rightarrow \text{BaSO}_4(s) + 2\,\text{K}^+(aq) + 2\,\text{Cl}^-(aq)

(a)

\text{Ba}^{2+}

and

\text{SO}_4^{2-}

(b)

\text{Ba}^{2+}

and

\text{Cl}^-

(c)

\text{K}^+

and

\text{Cl}^-

(d)

\text{K}^+

and

\text{SO}_4^{2-}