
Trong ion SO4^2-, số oxi hóa của S là bao nhiêu?
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phản ứng ôxi hóa khử là phản ứng có sự nhường và nhận
- Đúng. 231
- Sơn, mạ, dùng kim loại hoạt động mạnh hơn làm anot hi sinh. 62
- Cu^2+ + 2e -> Cu. 42
- +5. 227
- Tổng số electron chất khử nhường bằng tổng số electron chất oxi hóa nhận. 39
- +6. 17
- Ứng dụng của điện phân.
- Thường không phải. 132
- Chất nhận electron. 4
- Trong phản ứng 2KClO3 (xt MnO2, t°) -> 2KCl + 3O2, chất nào bị oxi hóa?
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