To
identify Sn4+ and Sn2+ ions, the reagent can be ( )
A: Excessive ammonia
B: Excessive hydrochloric acid
C: HgCl2
D: Excessive Na2S
identify Sn4+ and Sn2+ ions, the reagent can be ( )
A: Excessive ammonia
B: Excessive hydrochloric acid
C: HgCl2
D: Excessive Na2S
C,D
举一反三
- The<br/>situation of AB>SB<br/>means ( ) A: HCO3-<br/>retention B: Excessive<br/>HCO3- excretion C: CO2<br/>retention D: Excessive<br/>CO2 expiration E: Fixed<br/>acid retention
- 已知电对Fe3+/Fe2+、Fe2+/Fe、Sn4+/Sn2+、Sn2+/Sn的标准电极电势分别为 0.771V、-0.447V、0.151V、-0.1375V,在标准状态下,下列各组物质中能共存的是 A: Sn2+,Sn B: Fe3+,Sn2+ C: Fe3+,Sn D: Sn4+,Sn
- Edema is A: Excessive intracellular fluid B: Excess extracellular fluid C: Excessive fluid in tissue spaces or body cavity D: Excessive intravascular fluid
- A high degree of liquidity can enhance the firm’s safety, but an excessive degree of liquidity can reduce the firm’s return.
- Clinicians and researchers ___________ excessive use of cellphone can constitute an addiction.
内容
- 0
Staying at home and excessive sitting can keep healthy mentally.
- 1
Excessive alcohol can increase your blood glucose to dangerous levels.
- 2
下列氢氧化物碱性最强的是（）。 A: Sn(OH)4 B: Sn(OH)2 C: Pb(OH)4 D: Pb(OH)2
- 3
已知φӨ(Fe3+/Fe2+) = +0.771V, φӨ(Sn2+/Sn)= -0.136V, φӨ(Sn4+/Sn2+) = +0.154V, φӨ(Fe2+/Fe) = -0.44V。在标准状态下,下列各组物质中能共存的是 ( ) A: Fe3+、Sn2+ B: Fe、Sn2+ C: Fe2+、Sn2+ D: Fe3+、Sn
- 4
下列物质中碱性最强的是（） A: Sn（OH）4 B: Pb（OH）2 C: Sn（OH）2 D: Pb（OH）4