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26-09-2022
Chemistry

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Cho các cặp oxi hoá - khử sau: Zn2+/Zn, Cu2+/Cu , Fe2+/Fe. Biết tính oxi hoá của các ion tăng dần theo thứ tự: Zn2+, Fe2+, Cu2+, tính khử giảm dần theo thứ tự: Zn, Fe, Cu. Trong các phản ứng hoá học sau, phản ứng không xảy ra là

Fe + CuCl2.

B. Zn + CuCl2.

C. Cu + FeCl2.

D. Zn + FeCl2

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