All AP Chemistry Resources
Example Questions
Example Question #1 :Net Ionic Equations
What is the net ionic equation for the reaction that occurs when sodium chloride is mixed with silver nitrate.
Ag+(aq) + Cl-(aq) -> AgCl (s)
氯化钠(aq) + AgNO3 (aq) -> NaNO3(aq) + AgCl (aq)
Na+(aq) + NO3-(aq) -> NaNO3(s)
氯化钠(aq) + AgNO3(aq) -> NaNO3(aq) + AgCl (s)
氯化钠(aq) + AgNO3(aq) -> NaNO3(s) + AgCl (aq)
Ag+(aq) + Cl-(aq) -> AgCl (s)
Only the Ag and Cl ions are reacting to form solid silver chloride.
Example Question #2 :Net Ionic Equations
What is the net ionic equation that occurs when sodium chloride is mixed with potassium nitrate?
NaCl (aq) + KNO3(aq) -> KNO3(aq) + KCl (s)
NaCl (aq) + KNO3 (aq) -> NaNO3(aq) + KCl (aq)
No Reaction
NaCl (aq) + KNO3(aq) -> NaNO3(s) + KCl (aq)
Na+(aq) + NO3-(aq) -> NaNO3(s)
No Reaction
Since no precipitation is predicted by the solubility rules, there will be no reaction.
Example Question #3 :Net Ionic Equations
What is the net ionic reaction when potassium carbonate is mixed with Calcium bromide?
2 K2CO3(aq) + CaBr2(aq) -> 2 KBr (aq) + CaCO3(s)
Ca2+(aq) + CO32-(aq) -> CaCO3(s)
2 K+(aq) + Br-(aq) -> 2 KBr (s)
2 K2CO3(aq) + CaBr2(aq) -> 2 KBr (s) + CaCO3(aq)
2 K2CO3(aq) + CaBr2(aq) -> 2 KBr (aq) + CaCO3(aq)
Ca2+(aq) + CO32-(aq) -> CaCO3(s)
Only the calcium and carbonate ions are reacting according to the solubility rules to form calcium carbonate.
Example Question #4 :Net Ionic Equations
What is the net ionic reaction when a solution of Cd(NO3)2is reacted with (NH4)2S?
NH4+(aq) + NO3-(aq) -> NH4NO3(s)
Cd(NO3)2(aq) + (NH4)2S (aq) -> CdS (aq) + 2 NH4NO3(aq)
Cd(NO3)2(aq) + (NH4)2S (aq) -> CdS (s) + 2 NH4NO3(aq)
Cd(NO3)2(aq) + (NH4)2S (aq) -> CdS (s) + 2 NH4NO3(aq)
Cd2+(aq) + S2--> CdS (s)
Cd2+(aq) + S2--> CdS (s)
Only Cd and S ions are interacting according to the solubility rules to form a solid precipitant.
Example Question #5 :Net Ionic Equations
What is the net ionic reaction when a solution of rubidium sulfate is mixed with barium hydroxide?
Rb2SO4(aq) + Ba(OH)2(aq) -> 2 RbOH (aq) + BaSO4(s)
No Reaction
Ba2+(aq) + SO42-(aq) -> BaSO4 (s)
Rb+(aq) + OH-(aq) -> RbOH (s)
Rb2SO4(aq) + Ba(OH)2(aq) -> 2 RbOH (s) + BaSO4(aq)
Ba2+(aq) + SO42-(aq) -> BaSO4 (s)
Only the Ba and sulfate ions will react according to the solubility rules.
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