A. Al.
B. Mg.
C. Fe.
D. K.
Kim loại nào sau đây không khử được ion Cu2+ trong dung dịch CuSO4 thành Cu?
A.Mg.
B.K.
C.Al.
D.Fe.
Kim loại nào sau đây không khử được ion Cu2+ trong dung dịch CuSO4 thành Cu?
Kim loại nào sau đây không khử được ion Cu2+ trong dung dịch CuSO4 thành Cu?
A. A. Al.
B. B. Mg.
C. C. Fe.
D. D. K.
Đáp án và lời giải
Đáp án:D
Lời giải:
Trong dd K khử H2O nên không khử được ion Cu2+ thành Cu;
Vậy đáp án đúng là D
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