Chm question?
回答 (1)
2020-05-11 4:24 pm
Cd²⁺(aq) + Fe(s) → Cd(s) + Fe²⁺(aq) E° = 0.0400 V
Nernst equation:
E = E° - {RT/(nF)} ln([Fe²⁺]/[Cd²⁺])
0.000 = 0.0400 - {8.314 × 298 / (2 × 96485)} ln([Fe²⁺]/[Cd²⁺])
{8.314 × 298 / (2 × 96485)} ln([Fe²⁺]/[Cd²⁺]) = 0.0400
ln([Fe²⁺]/[Cd²⁺]) = 3.1155
[Fe²⁺]/[Cd²⁺] = e³˙¹¹⁵⁵
[Fe²⁺]/[Cd²⁺] = 22.5
Nernst equation:
E = E° - {RT/(nF)} ln([Fe²⁺]/[Cd²⁺])
0.000 = 0.0400 - {8.314 × 298 / (2 × 96485)} ln([Fe²⁺]/[Cd²⁺])
{8.314 × 298 / (2 × 96485)} ln([Fe²⁺]/[Cd²⁺]) = 0.0400
ln([Fe²⁺]/[Cd²⁺]) = 3.1155
[Fe²⁺]/[Cd²⁺] = e³˙¹¹⁵⁵
[Fe²⁺]/[Cd²⁺] = 22.5
收錄日期: 2021-04-18 18:31:32
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20200511063659AACSA05