Multiple Choice
Which of the following represents the right side of the complete ionic equation for dissolving Al(NO3)3 in water?
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6. Chemical Quantities & Aqueous Reactions
Complete Ionic Equations
Multiple Choice
Which of the following represents the total ionic equation for the reaction between HNO3 and NaOH in aqueous solution?
A
HNO3 (aq) + NaOH (aq) → NaNO3 (aq) + H2O (l)
B
H^+ (aq) + NO3^- (aq) + Na^+ (aq) + OH^- (aq) → Na^+ (aq) + NO3^- (aq) + H2O (l)
C
H^+ (aq) + OH^- (aq) → H2O (l)
D
HNO3 (aq) + OH^- (aq) → NO3^- (aq) + H2O (l)
Verified step by step guidance1
Identify the reactants and products in the given reaction: HNO3 (aq) + NaOH (aq) → NaNO3 (aq) + H2O (l). Both HNO3 and NaOH are strong electrolytes and will dissociate completely in aqueous solution.
Write the dissociation of each strong electrolyte into its ions: HNO3 (aq) dissociates into H^+ (aq) and NO3^- (aq), and NaOH (aq) dissociates into Na^+ (aq) and OH^- (aq). Similarly, NaNO3 (aq) dissociates into Na^+ (aq) and NO3^- (aq).
Express the total ionic equation by replacing all strong electrolytes with their respective ions, while keeping water as a molecular species since it is a liquid and does not dissociate: H^+ (aq) + NO3^- (aq) + Na^+ (aq) + OH^- (aq) → Na^+ (aq) + NO3^- (aq) + H2O (l).
Recognize that spectator ions (ions that appear unchanged on both sides of the equation) can be identified. In this case, Na^+ (aq) and NO3^- (aq) are spectator ions.
Confirm that the total ionic equation includes all ions present in the reaction mixture before and after the reaction, showing the actual species in solution.
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