Đáp án:
Giải thích các bước giải:
Sửa: Câu c thêm `NO_2` vào sản phẩm tạo thành.
a, `Fe_2O_3 + 3CO \overset{t^o}\to 2Fe\downarrow + 3CO_2\uparrow`
\(2\times |\ \mathop{Fe}\limits^{+3}+3e\to \mathop{Fe}\limits^{0}\\ 3\times |\ \mathop{C}\limits^{+2}\to\mathop{C}\limits^{+4}+2e\)
b, `Mg + 2H_2SO_{4 \text{(đặc, nóng)}} \overset{t^o}\to MgSO_4 + SO_2\uparrow + 2H_2O`
\(1\times |\ \mathop{Mg}\limits^{0}\to \mathop{Mg}\limits^{+2}+2e\\ 1\times |\ \mathop{S}\limits^{+6}+2e \to \mathop{S}\limits^{+4}\)
c, `Cu + 4HNO_3 \to Cu(NO_3)_2 + 2NO_2\uparrow + 2H_2O`
\(1\times |\ \mathop{Cu}\limits^{0}\to \mathop{Cu}\limits^{+2}+2e\\ 2\times |\ \mathop{N}\limits^{+5}+1e\to \mathop{N}\limits^{+4}\)
d, `Fe + CuSO_4 \to FeSO_4 + Cu\downarrow`
\(1\times |\ \mathop{Fe}\limits^{0}\to \mathop{Fe}\limits^{+2}+2e\\ 1\times |\ \mathop{Cu}\limits^{+2}+2e\to \mathop{Cu}\limits^{0}\)
\(\boxed{\text{LOVE TEAM}}\)
