有關　SO4 2- (redox reaction)

It is impossible to electrolyze the molten liquid of CuSO4. This is because CuSO4 would be decomposed on heating before it melts.
CuSO4(s) → CuO(s) + SO3(g)
Therefore, the substance being electrolyzed is the molten liquid of CuO instead. Oxygen is formed at the anode, while copper is formed at the cathode.


電解 CuSO4 的熔融液是不可能的，因為CuSO4 在受熱熔化前，已受熱分解。
CuSO4(s) → CuO(s) + SO3(g)
因此，被電解的是 CuO 的熔融液，在陽極形成氧，在陰極形成銅。
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