Question

Iron tablets may be used in the treatment of anaemia. To analyse the iron(II) content of commercially available iron tablets, a student used four tablets, each of mass 0.360 g to make up 250 mL of solution in a volumetric flask using dilute sulfuric acid and deionized water. About 15.0 mL of dilute sulfuric acid was added to a 25.0 mL portion of this iron(II) solution and the mixture then titrated with a 0.01025 M solution of potassium manganite(VII), KMnO₄. In the titration the manganite(VII) is reduced to manganite(II) and the iron(II) is oxidized to iron(III). If the titration required 13.85 mL of the KMnO₄ solution, calculate

(i) the concentration of the iron(II) solution in moles per liter. Ans:    moles L^-1

(ii) the mass of iron(II) in one tablet. Ans:    g

(iii) the percentage by mass of iron(II) in each tablet. Ans:    %

Answer 1

thanks and hope you like the answer