How can you prepare 0.1N ferrous ammonium sulphate?

To prepare 0.1N ferrous ammonium sulfate solution, dissolve the appropriate weight of ferrous ammonium sulfate crystals in a known volume of water, followed by dilution to the desired volume. The molecular weight of ferrous ammonium sulfate is needed to calculate the amount required to make the solution. Always wear appropriate personal protective equipment and handle chemicals in a well-ventilated area.