Your boss wants you to make 500 mL of an Iron stock solution with an Iron concentration of 40

Your boss wants you to make 500 mL of an Iron stock solution with an Iron concentration of 40

mg/L. You have a bottle of hydrated Iron(II)chloride (also known as ferrous chloride) FeCl2(H20)2 which is a crystaline solid. Complete the calculations needed to make this solution and briefly describe how you would make this solution. (Note that only a fraction of the chemical you weigh out to make the solution is actually Iron.) What is the concentration of the solution expressed as mmol/L Fe?