Spectator Ions

Spectator ions

• The ions in a chemical reaction that remain aqueous throughout the entire reaction.

• The chemical equation that represents the ions that are participating in the actual chemistry. The spectator ions are removed from the overall equation to reveal the net ionic equation.

• An insoluble (solid) substance that is formed from two soluble (aqueous) substances.

• 1. Both matter and mass are conserved throughout a chemical reaction.

Tags

NGSS.HS-PS1-7

Net ionic equation

• The ions in a chemical reaction that remain aqueous throughout the entire reaction.

• The chemical equation that represents the ions that are participating in the actual chemistry. The spectator ions are removed from the overall equation to reveal the net ionic equation.

• An insoluble (solid) substance that is formed from two soluble (aqueous) substances.

Tags

NGSS.HS-PS1-7

ion that does not participate in a reaction

• spectator ion

• solvent

• solute

• aqueous solution

Sodium carbonate can be used to neutralise hydrochloric acid. The correct equation omitting the spectator ions is

• H⁺(aq) + OH⁻(aq) → H₂O(ℓ)

• 2H⁺(aq) + CO₃²⁻(aq) → H₂O(ℓ) + CO₂(g)

• 2H⁺(aq) + CO₃²⁻(g) → H₂O(ℓ) + CO₂(g)

• Na⁺(aq) + Cl⁻(aq) → NaCl⁻(aq)

What are spectator ions in a chemical reaction?

• Ions that participate in the formation of a precipitate

• Ions that remain unchanged and do not participate in the reaction

• Ions that change their oxidation state during the reaction

• Ions that form a new compound

Which of the following is a characteristic of spectator ions?

• They are always gases

• They are always solids

• They remain in the aqueous phase

• They form a precipitate

In the reaction between sodium chloride and silver nitrate, which ions are the spectator ions?

What is the role of spectator ions in a net ionic equation?

• They are included to balance the equation

• They are removed to simplify the equation

• They are the main reactants

• They form the products

Which of the following reactions involves spectator ions?

• @@ ext{HCl} + ext{NaOH} ightarrow ext{NaCl} + ext{H}_2 ext{O}@@

• @@ ext{AgNO}_3 + ext{NaCl} ightarrow ext{AgCl} + ext{NaNO}_3@@

• @@ ext{H}_2 + ext{O}_2 ightarrow ext{H}_2 ext{O}@@

• @@ ext{CaCO}_3 ightarrow ext{CaO} + ext{CO}_2@@

In the reaction @@ ext{BaCl}_2 + ext{Na}_2 ext{SO}_4 ightarrow ext{BaSO}_4 + 2 ext{NaCl}@@, which ions are the spectator ions?