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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)
NaCl (aq) + AgNO3 (aq) -> NaNO3 (aq) + AgCl (aq)
Na+ (aq) + NO3- (aq) -> NaNO3 (s)
NaCl (aq) + AgNO3 (aq) -> NaNO3 (s) + AgCl (aq)
NaCl (aq) + AgNO3 (aq) -> NaNO3 (aq) + AgCl (s)
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) -> NaNO3 (aq) + KCl (aq)
Na+ (aq) + NO3- (aq) -> NaNO3 (s)
NaCl (aq) + KNO3 (aq) -> NaNO3 (s) + KCl (aq)
NaCl (aq) + KNO3 (aq) -> KNO3 (aq) + KCl (s)
No Reaction
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 K+ (aq) + Br- (aq) -> 2 KBr (s)
Ca2+ (aq) + CO32- (aq) -> CaCO3(s)
2 K2CO3 (aq) + CaBr2 (aq) -> 2 KBr (aq) + CaCO3 (s)
2 K2CO3 (aq) + CaBr2 (aq) -> 2 KBr (aq) + CaCO3 (aq)
2 K2CO3 (aq) + CaBr2 (aq) -> 2 KBr (s) + 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)2 is reacted with (NH4)2S?
Cd(NO3)2 (aq) + (NH4)2S (aq) -> CdS (s) + 2 NH4NO3 (aq)
NH4+ (aq) + NO3- (aq) -> NH4NO3 (s)
Cd(NO3)2 (aq) + (NH4)2S (aq) -> CdS (s) + 2 NH4NO3 (aq)
Cd(NO3)2 (aq) + (NH4)2S (aq) -> CdS (aq) + 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?
Rb+ (aq) + OH- (aq) -> RbOH (s)
Ba2+ (aq) + SO42- (aq) -> BaSO4 (s)
Rb2SO4 (aq) + Ba(OH)2 (aq) -> 2 RbOH (s) + BaSO4 (aq)
No Reaction
Rb2SO4 (aq) + Ba(OH)2 (aq) -> 2 RbOH (aq) + BaSO4 (s)
Ba2+ (aq) + SO42- (aq) -> BaSO4 (s)
Only the Ba and sulfate ions will react according to the solubility rules.
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