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a)\(4FeS_2+11O_2\underrightarrow{t^o}2Fe_2O_3+8SO_2\)
\(2SO_2+O_2\underrightarrow{t^o}2SO_3\)
\(SO_3+H_2O\rightarrow H_2SO_4\)
b)\(m_{H_2SO_4}=\dfrac{50\cdot49\%}{100\%}=24,5g\Rightarrow n_{H_2SO_4}=0,25mol\)
Từ quá trình trên: \(4FeS_2\rightarrow H_2SO_4\)
\(\Rightarrow n_{FeS_2}=\dfrac{1}{4}n_{H_2SO_4}=\dfrac{1}{4}\cdot0,25=\dfrac{1}{16}mol\)\
\(m_{FeS_2}=\dfrac{1}{16}\cdot120=7,5g\)
c)\(n_{NaOH}=0,3\cdot1=0,3mol\)
\(SO_2+2NaOH\rightarrow Na_2SO_3+H_2O\)
0,15 0,3 0,15
\(m_{Na_2SO_3}=0,15\cdot126=18,9g\)
SO2 + H2S → S + H2O
H2S + HNO3 → H2SO4 + NO2 + H2O
H2SO4 + BaCl2 → BaSO4 + HCl
HCl + MnO2 → MnCl2 + Cl2 + H2O
Cl2 + NaOH → NaCl + NaClO + H2O
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 : \(\overset{0}{2O}+2.2e\rightarrow\overset{-2}{2O}|\times11\)
\(\Rightarrow4FeS_2+11O_2\rightarrow2Fe_2O_3+8SO_2\)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
\(2NaOH+Cl_2\rightarrow NaCl+NaClO+H_2O\)
\(H_2S+4Br_2+4H_2O\rightarrow8HBr+H_2SO_4\)
\(NaCl+AgNO_3\rightarrow AgCl+NaNO_3\)
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 :))))
1,
| 4NH3 | + | 5O2 | → | 6H2O | + |
4NO |
2,
| 3CO | + | Fe2O3 | → | 2Fe | + | 3CO2 |
3,Cu+2H2SO4→2H2O+SO2+CuSO4
4,Fe+4HNO3→2H2O+NO+Fe(NO3)3
5,
| Al | + | 6HNO3 | → | 3H2O | + | 3NO2 | + | Al(NO3)3 |
6,4 Zn0 + 5 H2SO4 → 4 ZnSO4 + H2S + 4 H2O
7,4Mg + 10HNO3->4Mg(NO3)2 + NH4NO3 + 3H2O
8,2 KMnO4 + K2SO3 + 2 KOH → 2 K2MO2O4 + K2SO4 + H2O
9,2 KMnO4 + 10 FeSO4 + 8 H2SO4 → 2 Mn(SO4) + 5 Fe2(SO4)3 +K2SO4 + 8 H2O
\(FeS+2HCl\rightarrow2FeCl_2+H_2S\)
\(2H_2S+3O_2\rightarrow\left(t^o\right)2SO_2+2H_2O\)
\(2SO_2+O_2\rightarrow\left(t^o,V_2O_5\right)2SO_3\)
\(SO_3+H_2O\rightarrow H_2SO_4\)
\(Ba+H_2SO_4\left(l\right)\rightarrow BaSO_4+H_2\)
FeS + 2HCl → FeCl2 + H2S
2H2S+3O2-tO>2SO2+2H2O
2SO2+O2-to,V2O5>2SO3
SO3+H2O->H2SO4
H2SO4+BaO->BaSO4+H2O