Multiple Choice
What is the net ionic equation for the reaction between aqueous sodium chloride and aqueous silver nitrate?
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6. Chemical Quantities & Aqueous Reactions
Molecular Equations
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What are the spectator ions when magnesium nitrate reacts with potassium fluoride in an aqueous solution?
A
Mg²⁺ and F⁻
B
K⁺ and NO₃⁻
C
K⁺ and F⁻
D
Mg²⁺ and NO₃⁻
Verified step by step guidance1
Write the balanced chemical equation for the reaction between magnesium nitrate (Mg(NO₃)₂) and potassium fluoride (KF) in aqueous solution: Mg(NO₃)₂(aq) + 2 KF(aq) → MgF₂(s) + 2 KNO₃(aq).
Identify the states of each compound: Mg(NO₃)₂ and KF are aqueous, MgF₂ is a solid (precipitate), and KNO₃ is aqueous.
Write the complete ionic equation by breaking all aqueous compounds into their respective ions: Mg²⁺(aq) + 2 NO₃⁻(aq) + 2 K⁺(aq) + 2 F⁻(aq) → MgF₂(s) + 2 K⁺(aq) + 2 NO₃⁻(aq).
Identify the ions that appear on both sides of the complete ionic equation without undergoing any change. These are the spectator ions.
The spectator ions are K⁺ and NO₃⁻, as they do not participate in the formation of the precipitate and remain in the solution unchanged.
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