a) \(N_2+O_2\rightarrow2NO\)

\(\begin{matrix}N^0\rightarrow N^{+2}+2e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times1\end{matrix}\)

b) \(C_2H_5OH+3O_2\rightarrow2CO_2+3H_2O\)

\(\begin{matrix}C^{-2}\rightarrow C^{+4}+6e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times3\end{matrix}\)

c) \(CH_4+2O_2\rightarrow CO_2+2H_2O\)

\(\begin{matrix}C^{-4}\rightarrow C^{+4}+8e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times4\end{matrix}\)

d) \(2H_2S+3O_2\rightarrow2H_2O+2SO_2\)

\(\begin{matrix}S^{-2}\rightarrow S^{+4}+6e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times1\\\times3\end{matrix}\)

e) \(4NH_3+3O_2\rightarrow2N_2+6H_2O\)

\(\begin{matrix}N^{-3}\rightarrow N^0+3e\\O^0+2e\rightarrow O^{-2}\end{matrix}|\begin{matrix}\times2\\\times3\end{matrix}\)

a)N2+O2->2NO

b)C2H5OH+3O2->2CO2+3H2O

c)CH4+2O2->CO2+2H2O

d)H2S+3/2O2->H2O+SO2 / 2H2S+3O2->2H2O+2SO2

e)2NH3+3/2O2->N2+3H2O / 4NH3+3O2->2N2+6H2O

CHÚC BN HỌC TỐT :))))

\(\left\{{}\begin{matrix}xM^{2y\text{/}x}-\left(xn-2y\right)e\rightarrow xM^n\\N^{+5}+3e\rightarrow N^{+3}\end{matrix}\right.\\ 3M_xO_y+\left(4xn-2y\right)HNO_3\rightarrow3xM\left(NO_3\right)_n+\left(xn-2y\right)NO\uparrow+\left(2xn-y\right)H_2O\)

3MxOy + (4nx - 2y)HNO3 = 3xM(NO3)n + (nx - 2y)NO + (2nx - y)H2O

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

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

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

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

$\rm k)2KMnO_4 \xrightarrow{t^o} K_2MnO_4 + MnO_2 + O_2 \uparrow$
$\rm l)CH_4 + 2O_2 \xrightarrow{t^o} CO_2 + 2H_2O$
$\rm m)2Al + 3H_2SO_4 \rightarrow Al_2(SO_4)_3 + 3H_2 \uparrow$
$\rm n)Na_2CO_3 + CaCl_2 \rightarrow CaCO_3 \downarrow + 2NaCl$
$\rm o)2Na + 2H_2O \rightarrow 2NaOH + H_2 \uparrow$
$\rm p)CaO + 2HNO_3 \rightarrow Ca(NO_3)_2 + H_2O$
$\rm q)P_2O_5 + 3H_2O \rightarrow 2H_3PO_4$
$\rm r)Zn + 2HCl \rightarrow ZnCl_2 + H_2 \uparrow$
$\rm s)4Al + 3O_2 \xrightarrow{t^o} 2Al_2O_3$
$\rm t)Ba(OH)_2 + 2HCl \rightarrow BaCl_2 + 2H_2O$

1  2   1   1

\(CO_2+2NaOH\rightarrow Na_2CO_3+H_2O\)

2C${}^{}+\mathrm{4N}aOH\to \mathrm{2N}{}^{}C{}^{}+{}^{}O$

$C_x{H}_y{O}_z$+$\left(x+\frac{y}{4}-\frac{z}{2}\right)O_2$---->$xC{O}_2+\frac{y}{2}{H}_{2}O$

3)

2Al + 6H2SO4 → Al2(SO4)3 + 3SO2 + 6H2O

Cân bằng CxHyOz + O2 ------> CO2 + H2O - Thuy Kim

1) \(\overset{+2}{Fe}\overset{-1}{S_2}+\overset{0}{O_2}\rightarrow\overset{+3}{Fe_2}\overset{-2}{O_3}+\overset{+4}{S}\overset{-2}{O_2}\)

quá trình OXH :\(\overset{+2}{Fe}\overset{-1}{S_2}\rightarrow\overset{+3}{Fe}+\overset{+4}{2S}+11e|\times4\)

quá trình khử : \(\overset{0}{2O}+2.2e\rightarrow\overset{-2}{2O}|\times11\)

2) \(\overset{+2}{Fe}\overset{-2}{S}+H\overset{+5}{N}O_3\rightarrow\overset{+3}{Fe}\left(\overset{+5}{N}O_3\right)_3+\overset{+2}{N}\overset{-2}{O}+H_2O+H_2\overset{+6}{S}O_4\)

quá trình OXH : \(\overset{+2}{Fe}\overset{-2}{S}\rightarrow\overset{+3}{Fe}+\overset{+6}{S}+9e|\times1\)

quá trình khử : \(\overset{+5}{N}+3e\rightarrow\overset{+2}{N}|\times3\)

\(\Rightarrow FeS+6HNO_3\rightarrow Fe\left(NO_3\right)_3+3NO+2H_2O+H_2SO_4\)

CÒN ĐỂ CHIỀU MK LM CHO NHA

1. 3FeO + 10HNO3-> 3Fe(NO3)3 + NO + 5H2O

2. 3Fe3O4 + 28HNO3->3 Fe(NO3)3 + NO + 14H2O

3.3 Cu + 2KNO3 + 4H2SO4->3 CuSO4 + 2NO + K2SO4 + 4H2O

4. 3CuFeS2 +8 Fe2(SO4)3 +8 O2 +8 H2O-> 3CuSO4 + 19FeSO4 + 8H2SO4

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