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(1) 4 Na + O2 -to-> 2 Na2O
(2) Na2O + H2O -> 2 NaOH
(3) 3 NaOH + FeCl3 -> 3 NaCl + Fe(OH)3
(4) 2 Fe(OH)3 -to-> Fe2O3 + 3 H2O
(5) Fe2O3 + 3 CO -to-> 2 Fe + 3 CO2
(6) 2 Fe + 3 Cl2 -to-> 2 FeCl3
\(a,\left(1\right)Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\left(1:3:2:3\right)\)
\(\left(2\right)Mg+2HCl\rightarrow MgCl_2+H_2\left(1:2:1:1\right)\\ \left(3\right)2FeCl_3+3Ca\left(OH\right)_2\rightarrow2Fe\left(OH\right)_3+3CaCl_2\left(2:3:2:3\right)\)
\(\left(4\right)K_2CO_3+2HCl\rightarrow2KCl+H_2O+CO_2\left(1:2:2:1:1\right)\)
\(b,PTHH:2Cu+O_2\underrightarrow{t^o}2CuO\\ Áp.dụng.ĐLBTKL,ta.có:\\ m_{Cu}+m_{O_2}=m_{CuO}\\ m_{O_2}=m_{CuO}-m_{Cu}=32-25,6=6,4\left(g\right)\)
\(Fe_2O_3+3CO\underrightarrow{t^o}2Fe+3CO_2\)
\(Fe+2HCl->FeCl_2+H_2\uparrow\)
\(FeCl_2+AgNO_3->AgCl\downarrow+Fe\left(NO_3\right)_2\)
\(Fe\left(NO_3\right)_2+2NaOH->Fe\left(OH\right)_2\downarrow+2NaNO_3\)
\(Fe\left(OH\right)_2+H_2SO_4->FeSO_4+2H_2O\)
A) \(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)
B) \(2KOH+Fe\left(NO_3\right)_2\rightarrow Fe\left(OH\right)_2+2KNO_3\)
1)
- (1)Fe(NO3)3 + NaOH => NaNO3 + Fe(OH)3
- (2)2Fe(OH)3 =(t°)=> Fe2O3 + 3H2O
- (3) Fe2O3+ 6HCl => 2FeCl3 +3H2O
- (4) FeCl3 + 3AgNO3 => Fe(NO3)3 + 3AgCl
2)
- (1) 2Fe + 3Cl2 => 2FeCl3
- (2) FeCl3 + 3NaOH => Fe(OH)3 + 3NaCl
- (3)2Fe(OH)3 =(t°)=> Fe2O3 + 3H2O
- (4)Fe2O3 + 3H2 =(t°)=2Fe + 3H2O
- (5)Fe + 2HCl => FeCl2 + H2
- (6)FeCl2 + 2AgNO3 => 2AgCl + Fe(NO3)2
\(\left(1\right)Fe+\frac{1}{2}O_2\underrightarrow{t^o}FeO\\ \left(2\right)FeO+2HCl\rightarrow FeCl_2+H_2O\\ \left(3\right)FeCl_2+2NaOH\rightarrow Fe\left(OH\right)_2+2NaCl\\ \left(4\right)4Fe\left(OH\right)_2+O_2\underrightarrow{t^o}2Fe_2O_3+4H_2O\\ \left(5\right)Fe_2O_3+6HCl\rightarrow2FeCl_3+3H_2O\\ \left(6\right)FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)
2Fe + O2---->2FeO
FeO +2HCl------>FeCl2+H2O
FeCl2 + 2NaOH-----> Fe(OH)2 +2NaCl
4Fe(OH)2 +O2----->2Fe2O3+4H2O
Fe2O3+6HCl----->2FeCl3 +3H2O
FeCl3+3NaOH---->Fe(OH)3 +3NaCl
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