1) Cu + 4HNO₃ → Cu(NO₃)₂ + 2NO₂ + 2H₂O

2) Al + 4HNO₃ → Al(NO₃)₃ + NO + 2H₂O

3) Al + 6HNO₃ → Al(NO₃)₃ + 3NO₂ + 3H₂O

4) 2Fe + 6H₂SO₄ → Fe₂(SO₄)₃ + 3SO₂ + 6H₂O

1. 4HNO3 / 2H2O

\(Fe+6HNO_3\rightarrow Fe\left(NO_3\right)_3+3NO_2+3H_2O\)

\(2Fe+6H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+6H_2O+3SO_2\)

\(Al+6HNO_3\rightarrow Al\left(NO_3\right)_3+3NO_2+3H_2O\)

Các quá trình:

\(22223\times|Al^0\rightarrow Al^{+3}+3e\)

\(3\times|\left\{{}\begin{matrix}2020.2N^{+5}+16160e\rightarrow2020N^{+1}_2\\2021N^{+5}+6063e\rightarrow2021N^{+2}\end{matrix}\right.\) ⇒ Σe _nhận = 22223

Đặt hệ số vào PT, ta được:

\(22223Al+84852HNO_3\rightarrow22223Al\left(NO_3\right)_3+6060N_2O+6063NO+42426H_2O\)

Bạn tham khảo nhé!

a, 2Fe+6H2SO4\(\rightarrow\)Fe2(SO4)3+3SO2+6H2O

b, 3Cu+8HNO3\(\rightarrow\) 3Cu(NO3)2+2NO+4H2O

c, Fe+4HNO3\(\rightarrow\) Fe(NO3)3+NO+2H2O

d, Al+6HNO3\(\rightarrow\)Al(NO3)3+3NO2+3H2O

e, Cu+4HNO3\(\rightarrow\) Cu(NO3)2+2NO2+2H2O

Chúc bạn học tốt!

11Al + 42HNO₃ → 11Al(NO₃)₃ + 3NO + 3N₂O + 21H₂O

17Al + 66HNO\(_3\)➝ 17Al(NO\(_3\))\(_3\) + 9NO + 3N\(_2\)O + 33H\(_2\)O

\(11Al+42HNO_3\rightarrow11Al\left(NO_3\right)_3+3NO+3N_2O+21H_2O\)

a. 6NH3 + 5O3 --> 6NO + 9H2O

b. 2S + HNO3 -to-> 2NO + H2SO4

c. 4NO2 + O2 + 2H2O --> 4HNO3

d. FeCl3 + 3AgNO3 --> Fe(NO3)3 + 3AgCl

e. 3NO2 + H2O -to-> 2HNO3 + NO

f. 3Ba(NO3)2 + Al2(SO4)3 --> 3BaSO4 + 2Al(NO3)3

a. 6NH₃ + 5O₃ \(\rightarrow\) 6NO + 9H₂O

b. 2S + HNO₃ \(\underrightarrow{to}\) 2NO + H₂SO₄

c. 4NO₂ + O₂ + 2H₂O \(\rightarrow\) 4HNO₃

d. FeCl₃ + 3AgNO₃ \(\rightarrow\) Fe(NO₃)₃ + 3AgCl

e. 3NO₂ + H₂O \(\underrightarrow{to}\) 2HNO₃ + NO

f. 3Ba(NO₃)₂ + Al₂(SO₄)₃ \(\rightarrow\) 3BaSO₄ + 2Al(NO₃)₃

1)

(5x-2y)FeO+(16x-6y)HNO₃\(\rightarrow\)(5x-2y)Fe(NO₃)₃+N_xO_y+(8x-3y)H₂O

2)

(5x-2y)M+(6nx-2ny)HNO₃\(\rightarrow\)(5x-2y)M(NO₃)_n+nN_xO_y+(3nx-ny)H₂O

3)

3xFe₂O₃+(6x-4y)Al\(\rightarrow\)6Fe_xO_y+(3x-2y)Al₂O₃

4)

3Fe_mO_n+(12m-2n)HNO₃\(\rightarrow\)3mFe(NO₃)₃+(3m-2n)NO+(6m-n)H₂O

5)

(10-2x)FeS₂+(60-6x)HNO₃\(\rightarrow\)(10-2x)Fe(NO₃)₃+15N₂O_x+(10+x)H₂O+(20-4x)H₂SO₄

8Al+30HNO3--->8Al(NO3)3+3N2O+15H2O

\(8Al+30HNO_3\rightarrow8Al\left(NO_3\right)_3+3N_2O\uparrow+15H_2O\)

a, 4Zn + 10HNO₃ = 4Zn(NO₃)₂ + N₂O + 5H₂O

4x Zn - 2e -> Zn2+

1x 2N+5 + 8e -> 2N+1

b, 23Zn + 56HNO₃ = 23Zn(NO₃)₂ + 2NO + 4N₂ + 28H₂O

23a x Zn - 2e -> Zn2+

2 x 5aN+5 + 23a e -> aN+2 + 4aN+0

Tối giản hệ số a = 1

c,d làm tương tự

e, (5-)Zn+(12-2) HNO3→(5-)Zn(NO3)2+ N2O + (6-) H2O

(5-) x Zn - 2e -> Zn2+

1 x 2N+5 + (10-)e -> 2N+

a, 4Zn + 10HNO₃ = 4Zn(NO₃)₂ + N₂O + 5H₂O

4x Zn - 2e -> Zn2+

1x 2N+5 + 8e -> 2N+1

b, 23Zn + 56HNO₃ = 23Zn(NO₃)₂ + 2NO + 4N₂ + 28H₂O

23a x Zn - 2e -> Zn2+

2 x 5aN+5 + 23a e -> aN+2 + 4aN+0

Tối giản hệ số a = 1

c,d làm tương tự

e, (5-)Zn+(12-2) HNO3→(5-)Zn(NO3)2+ N2O + (6-) H2O

(5-) x Zn - 2e -> Zn2+

1 x 2N+5 + (10-)e -> 2N+