## Chemistry: Molecular Approach (4th Edition)

a. $K_2CO_3(aq) + Pb(NO_3)_2(aq) \longrightarrow 2 KNO_3(aq)+ PbCO_3(s)$ b. $Li_2SO_4(aq) + Pb(C_2H_3O_2)_2(aq) \longrightarrow 2 LiC_2H_2O_3(aq) + PbSO_4(s)$ c. $Cu(NO_3)_2(aq) + MgS(aq) \longrightarrow CuS(s) + Mg(NO_3)_2(aq)$ d. No reaction.
1. Write the molecular formula of each compound. a. $K_2CO_3$ and $Pb(NO_3)_2$ b. $Li_2SO_4$ and $Pb(C_2H_3O_2)_2$ c. $Cu(NO_3)_2$ and $MgS$ d. $Sr(NO_3)_2$ and $KI$ 2. Determine the resulting ionic compounds by switching the anions (or cations): a. $KNO_3$ and $PbCO_3$ b. $LiC_2H_3O_2$ and $PbSO_4$ c. $CuS$ and $Mg(NO_3)_2$ d. $SrI_2$ and $KNO_3$ 3. Determine if they are soluble or insoluble. a. $PbCO_3$ is insoluble. b. $PbSO_4$ is insoluble. c. $CuS$ is insoluble. d. Both are soluble. 4. If both compounds are soluble, there will be no reaction. If some are insoluble, there will occur their precipitation. Do not forget to balance the reaction. a. $K_2CO_3(aq) + Pb(NO_3)_2(aq) \longrightarrow 2 KNO_3(aq)+ PbCO_3(s)$ b. $Li_2SO_4(aq) + Pb(C_2H_3O_2)_2(aq) \longrightarrow 2 LiC_2H_2O_3(aq) + PbSO_4(s)$ c. $Cu(NO_3)_2(aq) + MgS(aq) \longrightarrow CuS(s) + Mg(NO_3)_2(aq)$ d. No reaction.