Which ionic equation represents a precipitation reaction?
H+(aq)+OH−(aq)→H2O(l)\text{H}^+(\text{aq}) + \text{OH}^-(\text{aq}) \rightarrow \text{H}_2\text{O}(\text{l})H+(aq)+OH−(aq)→H2O(l)
Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s)\text{Zn}(\text{s}) + \text{Cu}^{2+}(\text{aq}) \rightarrow \text{Zn}^{2+}(\text{aq}) + \text{Cu}(\text{s})Zn(s)+Cu2+(aq)→Zn2+(aq)+Cu(s)
Ba2+(aq)+SO42−(aq)→BaSO4(s)\text{Ba}^{2+}(\text{aq}) + \text{SO}_4^{2-}(\text{aq}) \rightarrow \text{BaSO}_4(\text{s})Ba2+(aq)+SO42−(aq)→BaSO4(s)
CO32−(aq)+2H+(aq)→CO2(g)+H2O(l)\text{CO}_3^{2-}(\text{aq}) + 2\text{H}^+(\text{aq}) \rightarrow \text{CO}_2(\text{g}) + \text{H}_2\text{O}(\text{l})CO32−(aq)+2H+(aq)→CO2(g)+H2O(l)