What are the resulting spectator ions when aqueous solutions of rb2o and cacl2 are added together?

Explanation:

Spectator ions are the ions that do not take part of the reaction and, so, you do not show them in the net ionic equation.

1) Molecular equation:

You must show the phases

You are told both Rb₂O and CaCl₂ are in aqueous solutions, so you know their phases and you can write their ionization equations.

2) Ionization

       RbCl(aq) → Rb⁺ (aq) + Cl⁻ (aq)

3) Total ionic equation:

Now you can write the ionic equation:

2Rb⁺(aq) + O⁻ (aq) + Ca²⁺ (aq) + 2Cl⁻ (aq) → CaO(s) + 2Rb⁺(aq) + 2Cl⁻(aq)

4) Net ionic equation:

Cancel the ions that appear in the same form in the reactant and product sides:

So, you canceled 2Rb⁺ and 2Cl⁻ because they are the spectator ions.

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