Explain how stable iron(III) ions can be formed from iron(II) ions in
aqueous solution. Refer to the relevant energy changes of these ions only.
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The presence of Fe3+ ions is confirmed by the formation of brown precipitate with sodium hydroxide solution. Fe2+ ions lose their electrons and are oxidised to Fe3+ ions. ... In this reaction, bromine water acts as the oxidising agent, where as Fe2+ ions act as the reducing agent.
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