在电极反应中,其他条件不变,离子的浓度减小一半,φ[img=11x21]1803dd564146d28.png[/img]值不变的是( )。
A: Cu[img=17x22]1803dd5649f13af.png[/img] + 2 e[img=11x21]1803dd565317d13.png[/img] = Cu
B: I[img=7x22]1803dd565cb1434.png[/img] + 2 e[img=11x21]1803dd56658b4c0.png[/img] = 2I[img=11x21]1803dd566e62490.png[/img]
C: 2H[img=11x21]1803dd56764d35d.png[/img] + 2 e[img=11x21]1803dd567e9d87e.png[/img] = H[img=7x22]1803dd5686ffa22.png[/img]
D: Fe[img=17x22]1803dd568e4cd48.png[/img] + e[img=11x21]1803dd5697018a2.png[/img] = Fe[img=17x22]1803dd569fcffe9.png[/img]
A: Cu[img=17x22]1803dd5649f13af.png[/img] + 2 e[img=11x21]1803dd565317d13.png[/img] = Cu
B: I[img=7x22]1803dd565cb1434.png[/img] + 2 e[img=11x21]1803dd56658b4c0.png[/img] = 2I[img=11x21]1803dd566e62490.png[/img]
C: 2H[img=11x21]1803dd56764d35d.png[/img] + 2 e[img=11x21]1803dd567e9d87e.png[/img] = H[img=7x22]1803dd5686ffa22.png[/img]
D: Fe[img=17x22]1803dd568e4cd48.png[/img] + e[img=11x21]1803dd5697018a2.png[/img] = Fe[img=17x22]1803dd569fcffe9.png[/img]
举一反三
- 在电极反应中,其他条件不变,离子的浓度减小一半,值不变的是:( ) A: Cu[img=17x22]1803dd6126954b7.png[/img]+2e=Cu B: Br[img=7x22]1803dd613036718.png[/img]+2e=2 Br [img=11x21]1803dd6138b5a1c.png[/img] C: 2H[img=11x21]1803dd614135887.png[/img]+2e=H[img=7x22]1803dd6148ff8b1.png[/img] D: Cu[img=17x22]1803dd6126954b7.png[/img]+e=Cu[img=11x21]1803dd614135887.png[/img]
- 反应MnO[img=11x26]1803dd597219875.png[/img]+5Fe[img=17x22]1803dd597aded1f.png[/img]+8H[img=11x21]1803dd5982f2487.png[/img][img=35x13]1803dd598a8157e.png[/img]Mn[img=17x22]1803dd59939f153.png[/img]+5Fe[img=17x22]1803dd599ce0266.png[/img]+4H[img=7x22]1803dd59a5ef6a0.png[/img]O构成电池,在标准状态下表示符号为( ) A: (-)Pt︱Fe[img=17x22]1803dd59ae9d055.png[/img](c[img=11x21]1803dd59b70a07f.png[/img]), Fe[img=17x22]1803dd59bf2a421.png[/img](c[img=11x21]1803dd59c82f605.png[/img])‖MnO[img=11x26]1803dd59d0e7c34.png[/img](c[img=11x21]1803dd59d9cdd93.png[/img]),Mn[img=17x22]1803dd59e29bd7d.png[/img](c[img=11x21]1803dd59eb8a666.png[/img])︱Pt(+) B: (-)Pt︱MnO[img=11x26]1803dd59d0e7c34.png[/img](c[img=11x21]1803dd59d9cdd93.png[/img]),Mn[img=17x22]1803dd59e29bd7d.png[/img](c[img=11x21]1803dd59eb8a666.png[/img])‖Fe[img=17x22]1803dd59ae9d055.png[/img](c[img=11x21]1803dd59b70a07f.png[/img]), Fe[img=17x22]1803dd59bf2a421.png[/img](c[img=11x21]1803dd59c82f605.png[/img])︱Pt(+) C: (-)Pt︱Fe[img=17x22]1803dd59ae9d055.png[/img](c[img=11x21]1803dd59b70a07f.png[/img]), Fe[img=17x22]1803dd59bf2a421.png[/img](c[img=11x21]1803dd59c82f605.png[/img])‖Mn[img=17x22]1803dd59e29bd7d.png[/img](c[img=11x21]1803dd59eb8a666.png[/img]),MnO[img=11x26]1803dd59d0e7c34.png[/img](c[img=11x21]1803dd59d9cdd93.png[/img])︱Mn(+) D: (-)Pt︱MnO[img=11x26]1803dd59d0e7c34.png[/img](c[img=11x21]1803dd59d9cdd93.png[/img]),Mn[img=17x22]1803dd59e29bd7d.png[/img](c[img=11x21]1803dd59eb8a666.png[/img])‖Fe[img=17x22]1803dd59ae9d055.png[/img](c[img=11x21]1803dd59b70a07f.png[/img]), Fe[img=17x22]1803dd59bf2a421.png[/img](c[img=11x21]1803dd59c82f605.png[/img])︱Fe(+)
- 对电极反应反应Fe[img=17x22]1803dd593688451.png[/img]+e[img=11x21]1803dd593f0ee2e.png[/img]=Fe[img=17x22]1803dd5946fb818.png[/img]中有关离子浓度都减小一半时,φ (Fe[img=17x22]1803dd594f9ef1d.png[/img]/Fe[img=17x22]1803dd5958240ac.png[/img])的值不变。( )
- 将下列反应设计成原电池,不必用惰性电极的是( )。 A: H[img=7x22]1803dd54c4a87b6.png[/img]+Cl[img=7x22]1803dd54ccdd1cc.png[/img]=2HCl B: 2Fe[img=17x22]1803dd54d68f53a.png[/img] + Cu = 2Fe[img=17x22]1803dd54dee3a81.png[/img] + Cu[img=11x21]1803dd54e89f78a.png[/img] C: Ag[img=11x21]1803dd54f0b68dd.png[/img] + Cl[img=11x21]1803dd54f9957a3.png[/img] = AgCl D: 2Hg[img=17x22]1803dd550251254.png[/img] + Sn[img=17x22]1803dd550aaeb4f.png[/img] = Hg[img=17x27]1803dd5511f2954.png[/img] + Sn[img=17x22]1803dd551b2e2af.png[/img]
- 已知298.15K时,φ[img=11x21]17de88171672677.png[/img](Fe[img=17x22]17de88172301ad7.png[/img]/ Fe[img=17x22]17de88172ea9401.png[/img])=0.771V,φ[img=11x21]17de88173a7fa80.png[/img](Ag[img=11x21]17de881747233ad.png[/img]/ Ag)=0.7996V,则Ag+Fe[img=17x22]17de8817537b96e.png[/img]=Ag[img=11x21]17de88175f41678.png[/img]+Fe[img=17x22]17de88176b0e682.png[/img]的标准平衡常数为( )。 A: 3.042 B: 0.3288 C: 1.623 D: 0.616