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
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.