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a) 3FeO + 10HNO3 --> 3Fe(NO3)3 + NO + 5H2O
b) 4Zn + 5H2SO4 --> 4ZnSO4 + H2S + 4H2O
c) FexOy + (y-x)CO --to--> xFeO + (y-x)CO2
d) \(2C_xH_yO_z+\dfrac{4x+y-2z}{2}O_2\underrightarrow{t^o}2xCO_2+yH_2O\)
e) 3Fe3O4 + 28HNO3 --> 9Fe(NO3)3 + NO + 14H2O
g) 2KMnO4 + 16HCl --> 2KCl + 2MnCl2 + 5Cl2 + 8H2O
h) 2Al + 2NaOH + 2H2O --> 2NaAlO2 + 3H2
i) 2Cu(NO3)2 --to--> 2CuO + 4NO2 + O2
k) 2NaOH + Cl2 --> NaCl + NaClO + H2O
l) \(C_nH_{2n+2}+\dfrac{3n+1}{2}O_2\underrightarrow{t^o}nCO_2+\left(n+1\right)H_2O\)
m) 3FexOy + (12x-2y)HNO3 --> 3xFe(NO3)3 + (3x-2y)NO + (6x-y)H2O
1.\(Fe_xO_y+2yHCl-->xFeCl_{\dfrac{2y}{x}}+yH_2O\)
2.\(2C_xH_y+\left(\dfrac{4x+y}{2}\right)O_2-->2xCO_2+yH_2O\)
3.\(C_nH_{2n}+\dfrac{3n}{2}O_2-->nCO_2+nH_2O\)
4.\(C_nH_{2n+2}+\left(\dfrac{3n+1}{2}\right)O_2-->nCO_2+\left(n+1\right)H_2O\)
5. \(2C_xH_yO_z+\left(\dfrac{4x+y-2z}{2}\right)O_2-->2xCO_2+yH_2O\)
6. (pthh này giống pt 3)
`2NaOH + CO_2 -> Na_2CO_3 + H_2O`
`BaCO_3 + 2HCl -> BaCl_2 + CO_2 + H_2O`
`3AgNO_3 + K_3PO_4 -> Ag_3PO_4 + 3KNO_3`
`FeS + 2HCl -> FeCl_2 + H_2S`
`Mg(OH)_2 + 2HCl -> MgCl_2 + 2H_2O`
$C_nH_{2n} + \dfrac{3n}{2} O_2 \xrightarrow{t^o} nCO_2 + nH_2O$
$C_nH{2n+2} + \dfrac{3n+1}{2} O_2 \xrightarrow{t^o} nCO_2 + (n+1)H_2O$
`Fe_xO_y + 2yHCl -> FeCl_{2y//x} + yH_2O`
`2M + 2nH_2SO_4 -> M_2(SO_4)_n + nSO_2 + 2nH_2O`
12 2Na+2H2O----2NaOH+H2
13 Fe+2HCl-----FeCl2+H2
14.2Na+2H2O-----2NaOH+H2
15.Zn+2HCl------ZnCl2+H2
16 2CxHy+(4x+y)O2------2xCO2+yH2O
17 P2O5+3H2O-------2H3PO4
18 Fe2(SO4)3+6KOH--------2Fe(OH)3+3K2SO4
19 2Fe+3Cl2-------2FeCl3
20 CnH2n – 2 + \(\dfrac{3n-1}{2}\)O2 -> nCO2 +(n-1) H2O.
21 N2O5+H2O------2HNO3
22 FeCL3+3NaOH-------Fe(OH)3+3NaCL
\(2Al+6HCl\Rightarrow2AlCl_3+3H_2\\ Mg+2HNO_3\Rightarrow Mg\left(NO_3\right)_2+H_2\\ C_2H_6O+3O_2\underrightarrow{t^o}2CO_2+3H_2O\\ 4P+5O_2\Rightarrow2P_2O_5\)
2Al(OH)3 → Al2O3 + 3H2O
Fe3O4 + 2C → 3Fe + 2CO2
$C_nH_{2n} + \dfrac{3n}{2}O_2 \xrightarrow{t^o} nCO_2 + nH_2O$
$C_nH_{2n+3}N + \dfrac{3n+1,5}{2}O_2 \xrightarrow{t^o} nCO_2 + (n + 1,5)H_2O + 0,5N_2$
$C_nH_{2n+2}O + \dfrac{3n}{2}O_2 \xrightarrow{t^o} nCO_2 + (n + 1)H_2O$
$Fe + CuSO_4 \to FeSO_4 + Cu$
$4Al(NO_3)_3 \xrightarrow{t^o} 2Al_2O_3 + 12NO_2 + 3O_2$
$3Fe_3O_4 + 8Al \xrightarrow{t^o} 9Fe + 4Al_2O_3$
$3Fe_xO_y + 2yAl \xrightarrow{t^o} yAl_2O_3 + 3xFe$
Câu 1:
a) \(C_4H_9OH+6O_2\xrightarrow[]{t^o}4CO_2+5H_2O\)
b) \(2C_nH_{2n-2}+\left(3n-1\right)O_2\xrightarrow[]{t^o}2nCO_2+\left(2n-2\right)H_2O\)
c) \(2Al+6H_2SO_{4\left(đ\right)}\xrightarrow[]{t^o}Al_2\left(SO_4\right)_3+3SO_2\uparrow+6H_2O\)
Câu 2:
Ta có: \(\left\{{}\begin{matrix}n_{Fe}=\dfrac{11,2}{56}=0,2\left(mol\right)\\n_{Mg}=\dfrac{2,4}{24}=0,1\left(mol\right)\end{matrix}\right.\)
Bảo toàn nguyên tố: \(\left\{{}\begin{matrix}n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe}=0,1\left(mol\right)\\n_{MgO}=n_{Mg}=0,1\left(mol\right)\end{matrix}\right.\)
\(\Rightarrow m_{rắn}=m_{Fe_2O_3}+m_{MgO}=0,1\cdot160+0,1\cdot40=20\left(g\right)\)
Câu 3:
a) PTHH: \(CuO+H_2\xrightarrow[]{t^o}Cu+H_2O\) (1)
\(Fe_2O_3+3H_2\xrightarrow[]{t^o}2Fe+3H_2O\) (2)
\(Fe+2HCl\rightarrow FeCl_2+H_2\uparrow\) (3)
b) Ta có: \(n_{H_2\left(3\right)}=\dfrac{2,24}{22,4}=0,1\left(mol\right)=n_{Fe}\) \(\Rightarrow m_{Cu}=12-0,1\cdot56=6,4\left(g\right)\) \(\Rightarrow n_{Cu}=0,1\left(mol\right)\)
Theo các PTHH: \(\left\{{}\begin{matrix}n_{CuO}=n_{Cu}=0,1\left(mol\right)\\n_{Fe_2O_3}=\dfrac{1}{2}n_{Fe}=0,05\left(mol\right)\end{matrix}\right.\) \(\Rightarrow\left\{{}\begin{matrix}m_{CuO}=0,1\cdot80=8\left(g\right)\\m_{Fe_2O_3}=0,05\cdot160=8\left(g\right)\end{matrix}\right.\)
\(\Rightarrow\%m_{CuO}=\dfrac{8}{8+8}\cdot100\%=50\%=\%m_{Fe_2O_3}\)
c) Theo các PTHH: \(n_{H_2}=n_{CuO}+3n_{Fe_2O_3}=0,1+0,15=0,25\left(mol\right)\)
\(\Rightarrow V_{H_2}=0,25\cdot22,4=5,6\left(l\right)\)
1) 4CxHy + (4x+y)O2 → 4xCO2 + 2yH2O
2) 2CnH2n + 3O2 → 2nCO2 + 2nH2O
3) 2CnH2n+2 + (3n+1)O2 → 2nCO2 + (2n+2)H2O
4) 2CnH2n-2 + (3n-1)O2 → 2nCO2 + (2n-2)H2O
5) 4CxHyOz + (4x+y-2z)O2 → 4xCO2 + 2yH2O
6) 4CxHyOzNt + (4x+y-2z)O2 → 4xCO2 + 2yH2O +2tN2
7) 4Mg + 5H2SO4 (Đặc, nóng) → 4MgSO4 + H2S + 4H2O
8) 3Zn + 4H2SO4 (Đặc, nóng) → 3ZnSO4 + S + 4H2O
9) 8Mg + 18HNO3 (Loãng) → 8Mg(NO3)2 + 2NH3 + 6H2O
10) Fe + HNO3 (Loãng) → Fe2(SO4)3 + N2 + H2O (Phương trình có vấn đề)