Multiple Choice
Which of the following is the correct net ionic equation for the reaction of solid calcium (Ca) with hydrochloric acid (HCl)?
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6. Chemical Quantities & Aqueous Reactions
Complete Ionic Equations
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Given the reaction: NaCl(aq) + AgNO3(aq) → AgCl(s) + NaNO3(aq), which of the following are the spectator ions in the complete ionic equation?
A
Ag+ and Cl-
B
Na+ and Cl-
C
Ag+ and NO3-
D
Na+ and NO3-
Verified step by step guidance1
Write the balanced molecular equation: \(\mathrm{NaCl(aq) + AgNO_3(aq) \rightarrow AgCl(s) + NaNO_3(aq)}\).
Write the complete ionic equation by separating all strong electrolytes into their ions: \(\mathrm{Na^+(aq) + Cl^-(aq) + Ag^+(aq) + NO_3^-(aq) \rightarrow AgCl(s) + Na^+(aq) + NO_3^-(aq)}\).
Identify the solid precipitate, which is \(\mathrm{AgCl(s)}\), and note that it remains as a compound in the ionic equation because it is not dissociated.
Determine which ions appear unchanged on both sides of the complete ionic equation; these ions do not participate in the formation of the precipitate and are called spectator ions.
Conclude that the spectator ions are \(\mathrm{Na^+}\) and \(\mathrm{NO_3^-}\) because they remain dissolved in solution and do not form the solid precipitate.
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