Câu 9(2 điểm): Hãy hoàn thành các phương trình hóa học sau:
a/ Zn + HCl ---- > ZnCl2 + H2
b/ NaOH + Fe2(SO4)3 ---- > Fe(OH)3 + Na2SO4
c/ Fe(OH)3 ---- > Fe2O3 + H2O
d/ C6H6 + O2 - - → CO2 + H2O
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a, 2Al+3H2SO4\(\rightarrow\)Al2SO4+3H2
c. 2Fe+3Cl2\(\rightarrow\)2FeCl3
b. 2NaOH+ZnCl2\(\rightarrow\).Zn(OH)2+2NaCl
d. 3Fe+2O2\(\rightarrow\)Fe3O4
\(\cdot2Al+3H_2SO_4\xrightarrow[]{}Al_2\left(SO_4\right)_3+3H_2\)
\(\cdot2NaOH+ZnCl_2\xrightarrow[]{}Zn\left(OH\right)_2+2NaCl\)
\(\cdot2Fe+3CL_2\xrightarrow[]{}2FeCl_3\)
\(\cdot3Fe+2O_2\xrightarrow[]{}Fe_3O_4\)
\(a,2Al+6HCl\to 2AlCl_3+3H_2\\ b,2Fe(OH)_3+3H_2SO_4\to Fe_2(SO_4)_3+6H_2O\\ c,2Al+3Cl_2\xrightarrow{t^o}2AlCl_3\\ d,Na+H_2O\to NaOH+\dfrac{1}{2}H_2\)
\(a,2Al+6HCl\rightarrow2AlCl_3+3H_2\\ b,2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ c,4FeS_2+11O_2\rightarrow2Fe_2O_3+8SO_2\uparrow\\ d,Fe_xO_y+2yHCl\rightarrow xFeCl_{\dfrac{2y}{x}}+yH_2O\)
Câu 1:
\(a,Al_2O_3+6HNO_3\to 2Al(NO_3)_3+3H_2O\\ b,Ca(OH)_2+Na_2CO_3\to CaCO_3\downarrow+2NaOH\\ c,Fe_3O_4+4CO\xrightarrow{t^o}3Fe+4CO_2\\ d,N_2+3H_2\xrightarrow{t^o,p,xt}2NH_3\\ e,Zn+2HCl\to ZnCl_2+H_2\\ f,2H_2+O_2\xrightarrow{t^o}2H_2O\\ g,4Al+3O_2\xrightarrow{t^o}2Al_2O_3\\ h,2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O\\ i,2Al+6HCl\to 2AlCl_3+3H_2\)
\(e,\text{Tỉ lệ: }Zn:H_2=1:1;HCl:ZnCl_2=2:1\\ f,\text{Tỉ lệ: }Al:H_2=2:3;HCl:AlCl_3=3:1\)
Fe 2 O 3 + 3 H 2 → t o 2 Fe + 3 H 2 O Zn + 2 HCl → ZnCl 2 + H 2 Na + H 2 O → NaOH + 1 / 2 H 2 ↑ KClO 3 → t o KCl + 3 / 2 O 2 ↑
2AgNO3 + CaCl2 → 2AgCl + Ca(NO3)2
K2SO4 + Ba(OH)2 → BaSO4 + 2KOH
Fe2(SO4)3 + 3Ba(OH)2 → 3BaSO4 + 2Fe(OH)3
Na2CO3 + BaCl2 → BaCO3 + 2NaCl
Ba(HCO3)2 + Na2CO3 → BaCO3 + 2NaHCO3
MgCO3 + K2SO4 ----//---->
Ca(HCO3)2 + 2KOH → CaCO3 + K2CO3 + 2H2O
2NaHSO4 + 2KOH → K2SO4 + Na2SO4 + 2H2O
2KOH + H2SO4 → K2SO4 + 2H2O
Ba(OH)2 + 2HCl → BaCl2 + 2H2O
Fe(OH)2 + 2HCl → FeCl2 + 2H2O
2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
Na2CO3 + 2HCl → 2NaCl + H2O + CO2
Ca(HCO3)2 + 2HNO3 → Ca(NO3)2 + 2H2O + 2CO2
2NaOH + CuSO4 → Na2SO4 + Cu(OH)2
Ca(OH)2 + BaCl2 ----//---->
Fe2(SO4)3 + 6KOH → 3K2SO4 + 2Fe(OH)3
FeSO4 + Cu(OH)2 ----//---->
biểu diễn phản ứng hóa học trên là
A Fe2(SO4)3 + 6NaOH → 2Fe(OH)3 + 3Na2SO4
B Fe(SO4)2 + NaOH → FeOH + Na(SO4)2
C Fe2(SO4)3 + NaOH → Fe2(OH) + Na(SO4)3
D FeSO4 + 2NaOH → Fe(OH)2 + Na2SO4
\(Fe_2\left(SO_4\right)_3+6NaOH\rightarrow Fe\left(OH\right)_3+3Na_2SO_4\\ \Rightarrow A\)
\(1.2Fe+3Cl_2\overset{t^o}{--->}2FeCl_3\)
\(2.Zn+S\overset{t^o}{--->}ZnS\)
\(3.4P+5O_2\overset{t^o}{--->}2P_2O_5\)
\(4.Mg+2HCl--->MgCl_2+H_2\)
\(5.CO_2+H_2O--->H_2CO_3\)
\(6.K_2O+H_2O--->2KOH\)
\(7.4Na+O_2--->2Na_2O\)
\(8.Fe_2\left(SO_4\right)_3+3Ca\left(OH\right)_2--->2Fe\left(OH\right)_3\downarrow+3CaSO_4\)
\(9.Al_2O_3+3H_2SO_4--->Al_2\left(SO_4\right)_3+3H_2O\)
1) 2Fe+3Cl2 --to- > 2FeCl3
2)Zn+S --to- > ZnS
3) 4P+5O2 --to- > 2P2O5
4) Mg+ 3HCl ---> MgCl2 + H2
5)CO2+H2O --->H2CO3
6)K2O+H2O ----> 2KOH
7)4Na + O2 --to- > 2Na2O
8)Fe2(SO4)3 + 3Ca(OH)2 ----> 2Fe(OH)3+ 3CaSO4
9. Al2O3 + 3H2SO4 -----> Al2(SO4)3 + 3H2O
a: \(Zn+2HCl\rightarrow ZnCl_2+H_2\)
b: \(6NaOH+Fe_2\left(SO_4\right)_3\rightarrow2Fe\left(OH\right)_3+3Na_2SO_4\)
d: \(2C_6H_6+15O_2\rightarrow12CO_2+6H_2O\)
Tks :>