A、NH<sub>2sub>OH(羟氨)(pK<sub>bsub>=8.04) B、NH<sub>3sub>·H<sub>2sub>O(pK<sub>bsub>=4.74) C、CH<sub>3sub>COOH(pK<sub>asub>=4.74) D、HCOOH(pK<sub>asub>=3.74)
A、NH<sub>2sub>OH(羟氨)(pK<sub>bsub>=8.04) B、NH<sub>3sub>·H<sub>2sub>O(pK<sub>bsub>=4.74) C、CH<sub>3sub>COOH(pK<sub>asub>=4.74) D、HCOOH(pK<sub>asub>=3.74)
A、NH<sub>3sub>>H<sub>2sub>O>CH<sub>4sub> B、H<sub>2sub>O>NH<sub>3sub>>CH<sub>4sub> C、H<sub>2sub>O>CH<sub>4sub>>NH<sub>3sub> D、CH<sub>4sub>>NH<sub>3sub>>H<sub>2sub>O
A、[Cr(NH<sub>3sub>)<sub>4sub>(H<sub>2sub>O)<sub>2sub>]Cl<sub>3sub> B、[Cr(NH<sub>3sub>)<sub>4sub>(H<sub>2sub>O)<sub>2sub>Cl]Cl<sub>2sub> C、[Cr(NH<sub>3sub>)<sub>4sub>(H<sub>2sub>O)CL]Cl<sub>2sub>·H<sub>2sub>O D、[Cr(NH<sub>3sub>)<sub>4sub>Cl<sub>2sub>]Cl·2H<sub>2sub>O
A、NH<sub>3sub>.H<sub>2sub>O B、NH<sub>4sub>.H<sub>2sub>O C、NH<sub>3sub>OH D、NH<sub>4sub>OH
A、[Cr(NH<sub>3sub>)<sub>4sub>(H<sub>2sub>O)<sub>2sub>]Cl<sub>3sub> B、[Cr(NH<sub>3sub>)<sub>4sub>Cl<sub>2sub>]Cl C、[Cr(NH<sub>3sub>)<sub>4sub>(H<sub>2sub>O)Cl]Cl<sub>2sub> D、[Cr(NH<sub>3sub>)<sub>3sub>Cl<sub>3sub>]
A、[Cr(NH<sub>3sub>)<sub>4sub>(H<sub>2sub>O)<sub>2sub>]Cl<sub>3sub> B、[Cr(NH<sub>3sub>)<sub>4sub>Cl<sub>2sub>]Cl C、[Cr(NH<sub>3sub>)<sub>4sub>(H<sub>2sub>O)Cl]Cl<sub>2sub> D、[Cr(NH<sub>3sub>)<sub>3sub>Cl<sub>3sub>]
A、NaCl和C<sub>6sub>H<sub>12sub>O<sub>6sub> B、NaCl和BaCl<sub>2sub> C、CO(NH<sub>2sub>)<sub>2sub>和C<sub>6sub>H<sub>12sub>O<sub>6sub> D、CO(NH<sub>2sub>)<sub>2sub>和BaCl<sub>2sub>
A、NH<sub>3sub>和H<sub>2sub>O B、NH<sub>3sub>和OH- C、NH<sub>4sub>+和OH- D、H<sub>2sub>O和NH<sub>4sub>+
A、H<sub>2sub>S、 C<sub>2sub>O<sub>4sub>2-、 HCO<sub>3sub>- B、HPO<sub>4sub>2-、 NH<sub>4sub>+、 [Fe(H<sub>2sub>O)<sub>6sub>]3+ C、Na(S)、BF<sub>3sub>、H<sub>2sub>O D、NH<sub>4sub>+、CO<sub>3sub>2-、H<sub>2sub>O