有三种电极表示式: (1) Pt,H2(p)│H+(a=1), (2)Cu│Pt,H2(p)│H+(a=1),
(3) Cu│Hg()│Pt,H2(p)│H+(a=1),则氢电极的电极电势彼此关系为 : ()
A: 逐渐变大
B: 逐渐变小
C: 不能确定
D: 彼此相等
(3) Cu│Hg()│Pt,H2(p)│H+(a=1),则氢电极的电极电势彼此关系为 : ()
A: 逐渐变大
B: 逐渐变小
C: 不能确定
D: 彼此相等
举一反三
- 下列电池中电动势E最大的是 A: Pt | H2 (2 pø) | H+ (a = 1) || H+ (a = 1) | H2 (pø) | Pt B: Pt | H2 (pø) | H+ (a = 1) || H+ (a = 0.5) | H2 (pø) | Pt C: Pt | H2 (pø) | H+ (a = 1) || H+ (a = 1) | H2 (pø) | Pt D: Pt | H2 (2 pø) | H+ (a = 1) || H+ (a = 0.5) | H2 (pø) | Pt
- 下列四种电极⑴ Pt,H2()|H+;⑵ Cu|Pt,H2()|H+;⑶ Cu()|Hg()|Pt,H2()|H+;<br/>⑷ Cu()|KCl()|Pt,H2()|H+,当H2()的压力和H+的活度相同时,其电极电势的关系为:() A: 由前至后逐渐增大 B: 由前至后逐渐变小 C: 彼此相等 D: 无法确定
- 标准氢电极是指:()。 A: Pt|H2(p(H2)=100kPa)|OH-(a=1) B: Pt|H2(p(H2)=100kPa)|H+(a=10-7) C: Pt|H2(p(H2)=100kPa)|H+(a=1)
- 【4.4】标准氢电极是 。 A: Pt,H2 ( pθ)│OH (a OH = 1) B: Pt,H2 ( pθ)│OH (aOH =10-7) C: Pt,H2 ( pθ)│H+( aH +=10-7) D: Pt,H2 ( pθ)│H+(aH += 1)
- 标准氢电极是指: A: Pt(s)∣H2[p = 100kPa]∣OH-(a=1) B: Pt(s)∣H2[p = 101.325kPa]∣OH-(a=1) C: Pt(s)∣H2[p = 100kPa]∣H+ (a=1) D: Pt(s)∣H2[p = 101.325kPa]∣H+(a=1)