Iron(II) hydroxide. Iron(II) hydroxide precipitate (Fe(OH)2) is formed by adding 1M solution of sodium hydroxide (NaOH) to 0.2M solution of iron(II) sulfate (FeSO4). The reaction is FeSO4 + NaOH -> Fe(OH)2 + Na2SO4. Pure iron(II) hydroxide is white, however even trace amounts of oxygen make it greenish. | |
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