問題詳情
(3)另取25.00mL該混合液，改加入過量Fe3+離子與鹽酸。充分反應後，先將酸鹼值調至中性，再滴入數滴澱粉，隨即以0.010M的Na2S2O3滴定，發現加入25.00mL時，溶液由藍色褪為無色。若Fe3+離子不會氧化氯離子或Na2S2O3，則未知溶液中氯化鉀的濃度為多少M？(3分)
參考答案
答案：C
難度：適中0.414707
統計：A(1022),B(170),C(1111),D(90),E(0)
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