問題詳情
15. 已知：2Fe3＋＋Fe→3Fe2＋。現將Fe2O3與Fe的混合物投入足量的稀鹽酸中，待反應完全後，發現溶液中不含Fe3＋，而所含的Fe2＋與H2的莫耳數比為5：2。試求原混合物中Fe2O3與Fe的莫耳數比為何？
(A)1：3
(B)1：2
(C)2：1
(D)2：3。
(A)1：3
(B)1：2
(C)2：1
(D)2：3。
參考答案
無參考答案
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