ch asked in 科學及數學化學 · 1 decade ago

Reaction with Fe and Cu

Bothe Fe and Cu could form ions of different charge. But how to determine

which to use for writing up the equation???

e.g. 2Fe + 3Cl2 -> 2FeCl3 why should use Fe3+ but not Fe2+??

Does it have to deal with the oxidation state ????

Explain briefly.

1 Answer

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  • 1 decade ago
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    If the oxidising power of the element is stronger, then it can oxidise the metal to a higher oxidisation state.

    2Fe + 3F2 → 2FeF3

    2Fe + 3Cl2 → 2FeCl3

    2Fe + 3Br2 → 2FeBr3

    2Fe + 2I2 → 2FeI2

    Cu is always to Cu2+ with F2, Cl2, Br2, I2(may not react or need strong heating)

    Source(s): myself
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