11.2. Types of Chemical Reactions.
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When AgNO3 (aq) and NaCl (aq) are mixed, a white precipitate of AgCl (s) is formed. We can write a balanced equation to describe this double-replacement reaction:
AgNO3 (aq) + NaCl (aq) → AgCl (s) + NaNO3 (aq)
Two other types of equations can be written for this reaction (complete ionic equation and a net-ionic equation)
Ba(NO3)2 + Na2CO3 (aq)→ BaCO3 (s) + 2 NaNO3 (aq)
Complete ionic equation:
Ba2+(aq) + 2 NO3 - (aq) + 2 Na+(aq) + CO3 2- (aq)
→ BaCO3(s) + 2 Na+(aq)+ 2 NO3 - (aq)
Net Ionic equation:
Sodium nitrate is soluble but barium carbonate is insoluble. The net ionic equation is