Is there a way simple way to turn iron(III) acetate into iron(II) acetate or vice versa?
Edit (as per answer below): an oxidiser like hydrogen peroxide will turn iron(II) acetate into iron(III) acetate. A reducer (not sure what household product) will do the reverse.
Some background: my partner soaks scrap cast iron in white vinegar for several weeks and then uses the resulting liquid as a mordant for dyeing. According to wikipedia's page on iron acetate, soaking iron in vinegar creates a mix of iron(II) acetate and iron(III) acetate. As I understand it, the oxidation state of the iron used as a mordant effects the colour of the dye on the fabric. As such, it would be nice to be able to experiment with just iron(II) or just iron(III). Is this possible to achieve using household chemicals?
Even more background: The dyeing process is soak fabric in mordant water. Dry fabric. Wrap fabric with leaves and place in boiling water. Unwrap and admire beautiful prints :)