我本書話...一個copper同magnesium組成既chemical cell is not a reliable source of electricity...因為當hydrogen gas is evolved in the copper electrode, the voltage of the cell dropped quickly ..
點解有hydrogen, 個voltage就會drop quickly??
simple chemical cell問題..chem勁人幫幫忙
2008-08-25 5:13 pm
回答 (1)
2008-08-25 5:28 pm
✔ 最佳答案
2H+ (aq) + 2e- -----> H2 (g)Hydrogen is come from the water in your solution.
When the gas bubbles formed at the copper electrode, it will separated the electrode from the solution, the reaction will stopped and volatage will drop. Until the bubbles are removed. This procedure will be repeated during the reaction, so the volatge will be dropped.
收錄日期: 2021-04-13 15:59:54
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