Question

in the reaction, ( k_{2}so_{4}+ba(no_{3})_{2}\to baso_{4}+2kno_{3} ), where equal moles of reactants are mixed together, which ions would be spectator ions in the solution?
( \bigcirc k^{+} ) and ( no_{3}^{-} )
( \bigcirc ba^{2+} ) and ( k^{+} )
( \bigcirc k^{+} ) and ( so_{4}^{2 - } )
( \bigcirc ba^{2+} ) and ( no_{3}^{-} )
( \bigcirc ba^{2+} ) and ( so_{4}^{2 - } )

Explanation:

Step1: Write the total ionic equation

$$\mathrm{2K^+ + SO_4^{2-} + Ba^{2+} + 2NO_3^- \to BaSO_4\downarrow + 2K^+ + 2NO_3^-}$$

Step2: Identify spectator ions

Spectator ions are ions that appear on both sides of the ionic equation. Here, $\mathrm{K^+}$ and $\mathrm{NO_3^-}$ are present on both sides.

Answer:

$\mathrm{K^+}$ and $\mathrm{NO_3^-}$ (first option)