A simple chemical cell can be set up by dipping two different metals in an electrolyte. The two metals are connected by an external wire.
我想問o係electrolyte之下,唔係兩個metals 都tends to lose electrons 架咩 ? ,
點解會有一個係gain左electrons?
咁lose 左electrons 之後點解會經個external wire 去到正極?
chem-chemical cell
2010-11-21 6:55 am
回答 (1)
2010-11-21 7:08 am
✔ 最佳答案
gain electron 果個唔係metal，係electrolyte入面的species，例如H+或metal ions例如︰
electrodes: magnesium and copper
electrolyte: dilute sulphuric acid
Mg loses electrons to copper, but copper won't gain the electrons. The hydrogen ions in the electrolyte would gain electrons to become hydrogen gas.
Negative terminal: Mg --> Mg2+ + 2 e-
Positive terminal: 2H+ + 2e- --> H2
所以由此至終copper並無gain 到electrons
收錄日期: 2021-04-13 17:39:19
原文連結 [永久失效]:
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