## Chemistry and Chemical Reactivity (9th Edition)

From Fig. 3-10 a) Soluble: $NO_3^-$ b) Insoluble: $S^{2-}$ and cation is not $NH_4^+$ or an alkali metal. c) Insoluble: $PO_4^{3-}$ and cation is not $NH_4^+$ or an alkali metal. d) Insoluble: $OH^-$ and cation is not an alkali metal, Ba or Sr.