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Dựa vào mối quan hệ giữa các hợp chất vô cơ , em hãy hoàn thành chuỗi phản ứng sau : a. Fe  FeCl2 Fe(OH)2 Fe(OH)3 Fe2(SO4)3 FeCl3 Fe(NO3)3 Fe(OH)3 Fe2O3 Fe . b. S  SO2 SO3 H2SO4 CuSO4 CuCl2 Cu(NO3)2 Cu(OH)2 CuO  Cu.
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