Chemistry and Chemical Reactivity (9th Edition)

a) $NH_4^+$ produces an acidic solution, $CO_3^{2-}, S^{2-}$ produce basic solutions. b) $Br^-, ClO_4^-$ won't affect pH c) $S^{2-}$ is the strongest base because it has a higher Kb. d) $CO_3^{2-}+H_2O\leftrightarrow HCO_3^-+OH^-$ $S^{2-}+H_2O\leftrightarrow HS^-+OH^-$