Question

[Gia Hưng]

các bước lập phương trình phản ứng oxi hóa khử của :

NH₃+O₂\(\rightarrow\)NO+H₂O

NH₃+O₂\(\rightarrow\)N₂+H₂O

Mg+HNO₃\(\rightarrow\)Mg(NO₃)₂+NO+H₂O

Al+HNO₃\(\rightarrow\)Al(NO₃₎₃+NO₂+H₂O

Zn+HNO₃\(\rightarrow\)ZN(NO₃)₂+NO₂+H₂O

Fe+HNO3\(\rightarrow\)Fe(NO₃)+NO+H₂O

Cu+H₂SO₄\(\rightarrow\)CuSO₄+SO₂+H₂O

Al+H₂SO₄\(\rightarrow\)Al₂(SO₄)₃+S+H₂O

Zn+H₂SO₄\(\rightarrow\)ZnSO₄+H₂S+H₂O

Fe+H₂SO₄\(\rightarrow\)Fe₂(SO₄)₃+H₂S+H₂O

Answer 1

[B.Thị Anh Thơ]

4 ý cuối :

1)

Cu + 2H2SO4→ CuSO4+ SO2+2H2O

Cu⁰ →Cu⁺² +2e║ x1

S⁺⁶+2e →S⁺⁴ ║ x1

2)

2Al+ 4H2SO4→ Al2(SO4)3+ S+ 4H2O

2Al⁰→2Al⁺³ +6e║x1

S⁺⁶ +6e→S⁰ ║x1

3)

4Zn +5H2SO4→ 4ZnSO4+ H2S+ 4H2O

Zn^{0\(\rightarrow\)} Zn⁺² +2e ║x4

S⁺⁶ +8e →S⁻² ║x1

4)

8Fe+ 15H2SO4→ 4Fe2(SO4)3+3H2S+ 12H2O

2Fe⁰→ 2Fe⁺³+6e║x4

S⁺⁶ +8e →S⁻² ║x3

Answer 2

[B.Thị Anh Thơ]

6 ý đầu

1.\(\overset{-3}{4NH_2}+\overset{0}{5O_2}\rightarrow\overset{+2+6}{4NO}+\overset{-2}{6H_2O}\)

4 X \(||\) N^-3 + 5e → N⁺²

5 X \(||\) 2O⁰ + 4e → 2O^-2

2.\(\overset{-3}{4NH3}+\overset{0}{3O_2}\rightarrow\overset{0}{2N_2}+\overset{-2}{6H_2O}\)

2 X \(||\) 2N^-3 + 6e → 2N⁰

3 X \(||\) 2O⁰ + 4e → 2O^-2

3.\(\overset{0}{3Mg}+\overset{+5}{8NO_3}\rightarrow\overset{+2}{3Mg\left(NO_3\right)_2}+\overset{+2}{2NO}+\overset{ }{4H_2O}\)

3 X \(||\) Mg⁰ → Mg⁺² + 2e

2 X \(||\) N⁺⁵ + 3e → N⁺²

4.\(\overset{0}{Al}+\overset{+5}{6NO_3}\rightarrow\overset{+3}{Al\left(NO_3\right)_3}+\overset{+4}{3NO_2}+\overset{ }{3H_2O}\)

1 X \(||\) Al⁰ → Al⁺³ + 3e

3 X \(||\) N⁺⁵ + 1e → N⁺⁴

5.\(\overset{0}{Zn}+\overset{+5}{4HNO_3}\rightarrow\overset{+3}{Fe\left(NO_3\right)_3}+\overset{+2}{NO}+\overset{ }{2H_2O}\)

1 X \(||\) Zn⁰ → Mg⁺² + 2e

2 X \(||\) N⁺⁵ + 3e → N⁺⁴

6.\(\overset{0}{Fe}+\overset{+5}{4HNO_3}\rightarrow\overset{+3}{Fe\left(NO_3\right)_3}+\overset{+2}{NO}+\overset{ }{2H_2O}\)

1 X \(||\) Fe0 → Fe+3 + 3e

1 X \(||\) N+5 + 3e → N+2