How do i get it (Fe3O4)?

10 October 2017 0 7K Report

i reaction (polymer + fecl3.6H2O). then i whashed product with NaOh(1 M) to get it Fe3O4. but i get it tiny Particles brick color that i think it is Fe(OH)3 and dont have magnetic feature. why i dont get it Fe3O4? Do I have to work؟

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