A、φ(Zn2+/Zn)(平) < φ(Fe2+/Fe)(平) B、φ(Zn2+/Zn) < φ(Fe2+/Fe) C、φ(H+/H<sub>2sub>)(平,Zn) < φ(H+/H<sub>2sub>)(平,Fe) D、φ(H+/H<sub>2sub>)(Zn) < φ (H+/H<sub>2sub>)(Fe)
A、φ(Zn2+/Zn)(平) < φ(Fe2+/Fe)(平) B、φ(Zn2+/Zn) < φ(Fe2+/Fe) C、φ(H+/H<sub>2sub>)(平,Zn) < φ(H+/H<sub>2sub>)(平,Fe) D、φ(H+/H<sub>2sub>)(Zn) < φ (H+/H<sub>2sub>)(Fe)
A、2Fe+6HCl==2FeCl<sub>3sub>+3H<sub>2sub>↑ B、Fe<sub>2sub>O<sub>3sub>+HCl==FeCl<sub>2sub>+H<sub>2sub>O C、Cu+2HCl==CuCl<sub>2sub>+H<sub>2sub>↑ D、Cu(OH)<sub>2sub>+2HCl==CuCl<sub>2sub>+ 2H<sub>2sub>O
A、Fe<sub>2sub>O<sub>3sub>+3H<sub>2sub>SO<sub>4sub>==Fe<sub>2sub>(SO<sub>4sub>)<sub>3sub>+3H<sub>2sub>O B、Cu(OH)<sub>2sub>+2HCl==CuCl<sub>2sub>+2H<sub>2sub>O C、CaCO<sub>3sub>+2HCl==CaCl<sub>2sub>+H<sub>2sub>O+CO<sub>2sub>↑ D、BaCl<sub>2sub>+H<sub>2sub>SO<sub>4sub>==BaSO<sub>4sub>↓+2HCl
A、MnO4-,H<sub>2sub>O<sub>2sub> B、Cl<sub>2sub>,NaOH C、Cr<sub>2sub>O<sub>7sub>2-,Fe3+ D、I-,Fe3+
A、NaOH B、浓NH<sub>3sub>·H<sub>2sub>O C、NH<sub>4sub>Cl+NH<sub>3sub> D、稀NH<sub>3sub>·H<sub>2sub>O
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
A、(NH<sub>4sub>)Fe(SO<sub>4sub>)<sub>2sub> B、(NH<sub>4sub>)2Fe(SO<sub>4sub>)<sub>2sub> C、(NH<sub>4sub>)Fe(SO<sub>3sub>)<sub>2sub> D、(NH<sub>4sub>)2Fe(SO<sub>3sub>)<sub>2sub>