1.Solution of EDTA is particularly valuable as titrants because the reagent combines with metal ions in...

Transcribed Image Text:

1.Solution of EDTA is particularly valuable as titrants because the reagent combines with metal ions in a 1:1 ratio regardless of the charge on the cation. For example, Fe(lI) and Fe(lll), complexes are formed with EDTA with great stability. The formation constants for the Fe(ll) EDTA chelate, and Fe(lll)-EDTA chelate are 2.1 x 1014 and 1.3 X 1025, respectively. a) For each ion complex mentioned above, write the equations of reactions for complex formation and expression for the complex formation constant. b) Calculate the concentration of Fet In a solution that was prepared by mixing 50.0 mLof 0.200 M Fowith 200,0 o/oho.0100 M EDTA. The mixture was buffered to a plt.of t1.00, (Given the valueofoic0.65 at pH-11.00) 1.Solution of EDTA is particularly valuable as titrants because the reagent combines with metal ions in a 1:1 ratio regardless of the charge on the cation. For example, Fe(lI) and Fe(lll), complexes are formed with EDTA with great stability. The formation constants for the Fe(ll) EDTA chelate, and Fe(lll)-EDTA chelate are 2.1 x 1014 and 1.3 X 1025, respectively. a) For each ion complex mentioned above, write the equations of reactions for complex formation and expression for the complex formation constant. b) Calculate the concentration of Fet In a solution that was prepared by mixing 50.0 mLof 0.200 M Fowith 200,0 o/oho.0100 M EDTA. The mixture was buffered to a plt.of t1.00, (Given the valueofoic0.65 at pH-11.00)