PROBLEM 2







THE MAIN REASON




• Brown water running from a faucet is due to insoluble Fe2O3 in water

• Elemental iron reacts with non-oxidising acids to form Fe2+, which oxidizes in air to Fe3+

• Fe3+ is soluble in acidic solution, but forms a hydrated oxide as a red-brown gel













Magnetism Properties



•Iron exhibits ferromagnetism, a much stronger form of magnetism than the others

•It arises when the unpaired electrons of the atoms or ions in a solid are influenced by the orientation of the electrons of their neighbours