What is the chemical equation of the reddish _ brown colour of the iron salt
There are several iron salts that can produce a reddish-brown color, so the chemical equation will depend on the specific salt. However, generally, the color of an iron salt is due to the presence of iron (II) or iron (III) ions that absorb certain wavelengths of visible light. The chemical equation for the formation of iron (II) or iron (III) ions will depend on the specific reaction that produces the salt.
The reddish-brown color of iron salts is generally due to the presence of hydrated iron(III) oxide, also known as rust. The chemical equation for the formation of hydrated iron(III) oxide is as follows:
4 Fe + 3 O2 + 6 H2O → 4 Fe(OH)3
In this equation, iron (Fe) reacts with oxygen (O2) and water (H2O) to form hydrated iron(III) oxide (Fe(OH)3). The rust formed is responsible for the reddish-brown color of iron salts.