試題詳解

12. Three redox reactions are shown as follows:
(1) 2 FeCl₃ +2 KI → 2 FeCl₂ + 2 KCl + I₂
(2) 2 FeCl₂ + Cl₂ → 2 FeCl₃
(3) 2 KMnO₄ + 16 HCl → 2 KCI + 2 MnCl₂ + 5 Cl₂ + 8 H₂O
If a solution contains Fe²⁺, CI, and I^-, which of the following is the reagent to be added to remove I^- without oxidizing Fe²⁺ and CI^-?
(A)Cl₂
(B)KMnO₄
(C)FeCl₃
(D)HCI
(E)I₂