What is the chemical equation of the reddish _ brown colour of the iron salt

Answer 1

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.