Why Do Fe2+ and Fe3+ Ions Have Different Colours?
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Why Do Fe2+ and Fe3+ Ions Have Different Colours?
Transition metal ions often form coloured solutions, and the colour depends on the oxidation state of the metal ion. In this video, we explain why iron(II) ions form green solutions and iron(III) ions form brown solutions. The key idea is that different oxidation states change the mass-to-charge ratio of the ion, altering d-orbital splitting ...
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