問題詳情
22. The MnO4ˉ ion is often used to analyze the Fe2+ concentration in an aqueous solution, based on the reaction in acidic condition as follows: (MnO4ˉ + Fe2+ ―→ Fe3+ + Mn2+ ) A 50.00 mL sample of a solution containing Fe2+ requires 40.00 mL of a 0.025 M KMnO4 solution for complete reaction. What is the concentration of the Fe2+ in the original solution?
(A) 1.0 × 10-1 M
(B) 1.8 × 10-2 M
(C) 4.5 × 10-3 M
(D) 1.8 × 10-3 M
(E) 9.1 × 10-4 M
參考答案
答案：A
統計：A:0,B:1,C:1,D:0,E:0
難度：計算中