Net Ionic Equations Practice Test

Aqueous calcium chloride is mixed with aqueous sodium carbonate, producing a precipitate. The balanced molecular equation is:

$\mathrm{CaCl_2(aq) + Na_2CO_3(aq) \rightarrow CaCO_3(s) + 2,NaCl(aq)}$

Which is the correct net ionic equation?

Aqueous sodium thiosulfate reacts with aqueous hydrochloric acid to form sulfur dioxide gas and elemental sulfur. The balanced molecular equation is:

$\mathrm{Na_2S_2O_3(aq) + 2,HCl(aq) \rightarrow 2,NaCl(aq) + SO_2(g) + S(s) + H_2O(l)}$

Which is the correct net ionic equation?