FeOH3fällningar

FeOH3fällningar refers to the precipitation of iron(III) hydroxide, also known as ferric hydroxide. This is a chemical process that occurs when iron(III) ions (Fe^3+) in an aqueous solution react with hydroxide ions (OH^-). The most common way to induce this precipitation is by adding a base, such as sodium hydroxide (NaOH) or ammonia (NH3), to a solution containing iron(III) salts like iron(III) chloride (FeCl3) or iron(III) sulfate (Fe2(SO4)3).

The chemical reaction can be represented as: Fe^3+ (aq) + 3OH^- (aq) -> Fe(OH)3 (s). Iron(III) hydroxide is a gelatinous, reddish-brown solid that is insoluble in water, hence it precipitates out of the solution. The formation of Fe(OH)3 is a common method used in various applications, including water treatment to remove dissolved iron and to clarify water. It is also a common intermediate product in the production of iron oxides used as pigments. The solubility of Fe(OH)3 is highly dependent on pH; it is more soluble in acidic conditions and precipitates readily in neutral to alkaline conditions. Variations in the conditions of precipitation, such as temperature and the rate of addition of the precipitating agent, can affect the particle size and morphology of the Fe(OH)3 precipitate.