Multiple Choice
What are the spectator ions in the reaction between Mg(OH)2 (aq) and HCl (aq)?
6. Chemical Quantities & Aqueous Reactions
Complete Ionic Equations
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What is the net ionic equation for the reaction that occurs when aqueous solutions of sodium hypochlorite (NaOCl) and ammonia (NH3) are mixed?
A
OCl⁻(aq) + NH3(aq) → NH2Cl(aq) + OH⁻(aq)
B
NaOCl(aq) + NH3(aq) → NaOH(aq) + NH4Cl(aq)
C
OCl⁻(aq) + NH4⁺(aq) → NH3(aq) + Cl⁻(aq)
D
Na⁺(aq) + NH3(aq) → NaNH2(aq) + H⁺(aq)
Verified step by step guidance1
Identify the reactants and products in the given reaction: Sodium hypochlorite (NaOCl) and ammonia (NH3) are mixed to form sodium hydroxide (NaOH) and ammonium chloride (NH4Cl).
Write the balanced molecular equation for the reaction: NaOCl(aq) + NH3(aq) → NaOH(aq) + NH4Cl(aq).
Dissociate all strong electrolytes into their respective ions: NaOCl(aq) dissociates into Na⁺(aq) and OCl⁻(aq), NaOH(aq) dissociates into Na⁺(aq) and OH⁻(aq), and NH4Cl(aq) dissociates into NH4⁺(aq) and Cl⁻(aq).
Identify the spectator ions that do not participate in the reaction: In this case, Na⁺(aq) and Cl⁻(aq) are spectator ions.
Write the net ionic equation by removing the spectator ions: OCl⁻(aq) + NH3(aq) → NH2Cl(aq) + OH⁻(aq).
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