What is the chemical formula for Iron Hydroxide?

The correct answer is the chemical formula for Iron Hydroxide, which is represented as Fe(OH)₃. Iron Hydroxide is formed from iron ions reacting with hydroxide ions. The notation Fe indicates that there is one iron atom in the compound, while (OH)₃ implies that there are three hydroxide groups attached to the iron ion.

Understanding the context of iron chemistry is crucial here. Iron can exist in multiple oxidation states, primarily +2 and +3. In this case, iron hydroxide formed with three hydroxide groups corresponds to the +3 oxidation state of iron, giving the compound its characteristics as a weakly soluble solid.

In contrast, Fe(OH)₂ represents iron(II) hydroxide, which is not the correct formula for Iron Hydroxide as typically referenced in environmental and chemical contexts. FeO is iron(II) oxide, which does not contain hydroxide ions at all, and Fe₂O₃ is iron(III) oxide, which again does not include hydroxide ions.