Introductory Chemistry (5th Edition)

(a) $(NH_4)_2S:$ is soluble. The ions are: $NH_4^+$ and $S^{2-}$. (b) $CuCO_3$ is insoluble. (c) $ZnS$ is insoluble. (d) $Pb(C_2H_3O_2)_2$ is soluble. The ions are: $Pb^{2+}$ and $C_2H_3O_2^-$.
Use the information in table 7.2 (Page 217), to predict the solubility of these compounds: Use the same figure to help when identifying the ions. (a) $(NH_4)_2S:$ Almost all compounds with $NH_4^+$ are soluble. The ions are: $NH_4^+$ and $S^{2-}$. (b) $CuCO_3$: Compounds with $CO_3^{2-}$ are, most of the times, insoluble. (c) $ZnS$: Compounds with $S^{2-}$ are, most of the times, insoluble. (d) $Pb(C_2H_3O_2)_2$: Almost all compounds with the acetate ion: $C_2H_3O_2^-$ are soluble. The ions are: $Pb^{2+}$ and $C_2H_3O_2^-$.