Interaction | Reaction | Process Data Page
Iron(II) is oxidised to iron(III) with dichromate(VI) solution, and the reaction is an example of a redox titration.
A redox indicator, usually sodium diphenylaminesulphonate, is required. Otherwise, the colour change is not very distinct. Protons are provided by dilute sulfuric acid or dilute hydrochloric acid as there are redox problems with most other mineral acids.Note the 6:1 mole ratio between Fe2+ and Cr2O72–.
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© Mark R. Leach 1999 –
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