1: 2KMnO4 + 16HCl -> 2KCl + 2MnCl2 + 5Cl2 + 8H2O

2: Fe3O4 + 8HCl --> FeCl2 + 2FeCl3 + 4H2O

3: 3FexOy + 2yAl --> 3xFe + yAl2O3

4: 2FexOy + (6x-2y)H2SO4 --> xFe2(SO4)3 + (3x-2y)SO2 + (6x-2y)H2O

5: FexOy + yH2 --> xFe + yH2O

1) 2

2) C_nH_{2n + 2} + \(\dfrac{3n+1}{2}\) O₂ -> nCO₂ + (n+1)H₂O.

3) C_nH_{2n – 2} + \(\dfrac{3n-1}{2}\) O₂ -> nCO₂ +(n-1) H2O.

4) C_nH_2n-6 +\(\dfrac{3n-3}{2}\) O2 -> nCO2 + (n-3) H2O

5) O+\(\dfrac{3n}{2}\)O2→n+(n+1)H2O

6) 2C_xH_yO_z + \(\dfrac{4x+y-2z}{2}\) O2 →2x CO₂ + yH₂O

7)

8)

9) 2

10)

11)

12) 3

3nAl + (6n-4m)Fe_xO_y \(\underrightarrow{t^0}\) 6Fe_nO_m + (3n-2m)Al₂O₃ 

FeO + 2HCl => FeCl₂ + H₂O

xFeCl_x + Cl₂ => xFeCl₃ 

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Bạn L :33 Tớ làm ko chắc nên bn thông cảm nka

1/  \(Cu+AgNO_3\rightarrow?+Ag\)

=>\(Cu+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2Ag\)

2/ \(Al+Fe_xO_y\rightarrow Fe+?\)

=>\(2yAl+3Fe_xO_y\rightarrow3xFe+yAl_2O_3\)

3/ \(Fe+O_2\rightarrow Fe_xO_y\)

=>\(2xFe+yO_2\rightarrow2Fe_xO_y\)

4/ \(Fe_{.3}O_4+HCl\rightarrow?+?+?\)

=>\(Fe_{.3}O_4+8HCl\rightarrow2FeCl_3+FeCl_2+4H_2O\)

5/\(C_xH_y+O_2\rightarrow CO_2+H_2O\)

=>\(2C_xH_y+\frac{4x+y}{2}O_2\rightarrow2xCO_2+yH_2O\)

$\mathrm{1)\; 3M}+\mathrm{4nH}N{O}_3\to \mathrm{3M}{\left(N{O}_3\right)}_n+\mathrm{nN}O+{\mathrm{2nH}}_{2}O$

M⁰ → M⁺ⁿ + ne |3

N⁺⁵ + 3e → N⁺² | n

Tương tự:

$\mathrm{2)\; 2M}+{\mathrm{2nH}}_{2}S{O}_4\to M_2{\left(S{O}_4\right)}_n+\mathrm{nS}{O}_2+{\mathrm{2nH}}_{2}O$

$\mathrm{3)\; 8M}+\mathrm{30H}N{O}_3\to \mathrm{8M}{\left(N{O}_3\right)}_3+{\mathrm{3N}}_{2}O+{\mathrm{15H}}_{2}O$

$\mathrm{M0\; +\; 3e}$→ M⁺³ | 8

$\mathrm{2N+5\; +\; 8e}$→ N₂⁺¹O | 3

$\mathrm{4)\; 2F}{e}_x{O}_y+\mathrm{2yH2}S{O}_4\to \mathrm{xF}{e}_2{\left(S{O}_4\right)}_{\frac{2y}{x}}+{\mathrm{2yH}}_{2}O$

$P$hương trình này không phải pt oxi hóa khử nên cứ cân bằng nhẩm bình thường

$\mathrm{các\; câu\; còn\; lại\; tương\; tự}$

\(Fe_xO_y+yH_2\underrightarrow{^{^{t^0}}}xFe+yH_2O\)

Chú ý điều kiện nhiệt độ nhé !

\(yH_2+Fe_xO_y\underrightarrow{t^o}xFe+yH_2O\)

3: \(Na_2O+H_2O\rightarrow2NaOH\)

1) 2Al + 3H₂SO₄ -> Al₂(SO₄)₃ +3H₂

2) FeO + 2HCl  -> FeCl₂ +H₂O

3) Na₂O + H₂O -> 2NaOH

4) N₂O₅ + H₂O -> 2HNO₃

\(2C_xH_yO_z+\dfrac{4x+y-2z}{2}O_2\underrightarrow{t^o}2xCO_2+yH_2O\)

\(2C_xH_yO+\dfrac{4x+y-2}{2}O_2\underrightarrow{t^o}2xCO_2+yH_2O\)

\(6Fe_xO_y+\left(12x-2y\right)H_2SO_{4\left(đ\right)}\underrightarrow{t^o}3xFe_2\left(SO_4\right)_3+\left(3x-2y\right)S+\left(12x-2y\right)H_2O\)

\(8Fe_xO_y+\left(30x-4y\right)HNO_3\rightarrow8xFe\left(NO_3\right)_3+\left(3x-2y\right)N_2O+\left(15x-2y\right)H_2O\)