chemical cell/salt bridge

2007-12-08 8:19 pm
一set由2杯half cell組成的chemical cell如果失去salt bridge,其實還可通電,只不過當兩杯solution內的charged ion真係去到"excess"的時候先會stop reaction,對嗎?
冇salt bridge的情況下電力可維持多久?
更新1:

To pkmoon2003: 電子在positive electrode時已經被用作reduction

回答 (2)

2007-12-09 6:19 am
✔ 最佳答案
The chemical can still work.But only very short time(around one to two second). It is because the charge of the solution cannot be replaced by the ion in the salt bridge.
Remenber the use of salt bridge(complete the circuit and avoid direct displacement), then you will understand.
2007-12-08 8:32 pm
不能通電,,原理就好似電綫亂咗咁...冇電子可以經過

2007-12-08 12:33:06 補充:
一定要電子走滿電路一圈才能產生電流

2007-12-08 22:51:52 補充:
這可能會造成極短暫的電流,但電子的速度實在太快,即是電子幾乎馬上便到斷路的位置,所以只能根據導綫的長度嚟斷定維持幾耐,少於一百米的導綫不會有電力


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