Viết PTHH cho mỗi chuyển đổi saU FeCl3-Fe(NO3)3 - Fe(OH)3-Fe2O3
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\(a,2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3\\ FeCl_3+3NaOH\to Fe(OH)_3\downarrow+3NaCl\\ 2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\xrightarrow{t^o}2Fe+3CO_2\\ Fe+H_2SO_4\to FeSO_4+H_2\\ FeSO_4+BaS\to BaSO_4\downarrow+FeS\\ FeS+2HCl\to FeCl_2+H_2\\ FeCl_2+2AgNO_3\to Fe(NO_3)_2+2AgCl\downarrow\)
\(b,2Al_2O_3\xrightarrow[criolit]{đpnc}4Al+3O_2\\ 2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ Al_2(SO_4)_3+6NaOH\to 2Al(OH)_3\downarrow+3Na_2SO_4\\ Al(OH)_3+3HNO_3\to Al(NO_3)_3+3H_2O\\ 2Al(NO_3)_3+3Mg\to 3Mg(NO_3)_2+2Al\\ Al+NaOH+H_2O\to NaAlO_2+\dfrac{3}{2}H_2\)
a) \(Ba\rightarrow Ba\left(OH\right)_2\rightarrow BaCl_2\rightarrow Ba\left(NO_3\right)_2\rightarrow BaCO_3\)
\(Ba+2H_2O\rightarrow Ba\left(OH\right)_2+H_2\uparrow\)
\(Ba\left(OH\right)_2+2HCl\rightarrow BaCl_2+2H_2O\)
\(BaCl_2+2AgNO_3\rightarrow Ba\left(NO_3\right)_2+2AgCl\downarrow\)
\(Ba\left(NO_3\right)_2+K_2CO_3\rightarrow2KNO_3+BaCO_3\downarrow\)
b) \(Fe\rightarrow Fe_3O_4\rightarrow Fe_2O_3\rightarrow Fe_2\left(SO_4\right)_3\rightarrow FeCl_3\rightarrow Fe\left(OH\right)_3\rightarrow Fe\left(NO_3\right)_3\)
\(3Fe+2O_2\xrightarrow[]{t^o}Fe_3O_4\)
\(2Fe_3O_4+\dfrac{1}{2}O_2\xrightarrow[]{t^o}3Fe_2O_3\)
\(Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\)
\(Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow2FeCl_3+3BaSO_4\downarrow\)
\(FeCl_3+3KOH\rightarrow Fe\left(OH\right)_3\downarrow+3KCl\)
\(Fe\left(OH\right)_3+3HNO_3\rightarrow Fe\left(NO_3\right)_3+3H_2O\)
\(2Fe\left(OH\right)_3-^{t^o}\rightarrow Fe_2O_3+3H_2O\\ Fe_2O_3+3H_2SO_4\rightarrow Fe_2\left(SO_4\right)_3+3H_2O\\ Fe_2\left(SO_4\right)_3+3BaCl_2\rightarrow2FeCl_3+3BaSO_4\\ FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\)
\(Fe\underrightarrow{1}Fe_2\left(SO_4\right)_3\underrightarrow{2}Fe\left(OH\right)_3\underrightarrow{3}Fe_2O_3\underrightarrow{4}Fe\underrightarrow{5}FeCl_2\underrightarrow{6}Fe\left(NO_3\right)_2\)
(1) \(2Fe+6H_2SO_{4đặc}\underrightarrow{t^o}Fe_2\left(SO_4\right)_3+3SO_2+6H_2O\)
(2) \(Fe_2\left(SO_4\right)_3+6NaOH\rightarrow2Fe\left(OH\right)_3+3Na_2SO_4\)
(3) \(2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\)
(4) \(Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)
(5) \(Fe+2HCl\rightarrow FeCl_2+H_2\)
(6) \(FeCl_2+2AgNO_3\rightarrow Fe\left(NO_3\right)_2+2AgCl\)
Chúc bạn học tốt
a) Các PTHH:
(1) 2 Fe +3 Cl2 -to-> 2 FeCl3
(2) FeCl3 + 3 NaOH -> Fe(OH)3 +3 NaCl
(3) 2 Fe(OH)3 -to-> Fe2O3 + 3 H2O
(4) Fe2O3 + 3 CO -to-> 2 Fe + 3 CO2
(5) Fe + 2 HCl -> FeCl2 + H2
(6) FeCl2 + 2 AgNO3 -> Fe(NO3)2 + 2 AgCl
b) Các PTHH:
(1) MnO2 + 4 HCl(đặc) -to-> MnCl2 + Cl2 + 2 H2O
(2) 3 Cl2 + 2 Fe -to-> 2 FeCl3
(3) FeCl3 + 3 NaOH -> Fe(OH)3 + 3 NaCl
(4) NaCl + H2O -ddpdddcmnx-> NaOH + 1/2 H2 + 1/2 Cl2
(5) Cl2 + Cu -to-> CuCl2
(6) CuCl2 + 2 AgNO3 -> Cu(NO3)2 + 2 AgCl
c) Các PTHH:
(1) 4 Al + 3 O2 -to-> 2 Al2O3
(2) Al2O3 + 6 HCl -> 2 AlCl3 + 3 H2O
(3) AlCl3 + 3 KOH -> 3 KCl + Al(OH)3
(4) 2 Al(OH)3 -to-> Al2O3 +3 H2O
(5) 2 Al2O3 -đpnc-> 4 Al + 3 O2
a)
\(Al+\dfrac{3}{2}Cl_2\rightarrow AlCl_3\\ AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\\ 2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\\ Al_2O_3\xrightarrow[criolic]{đpnc}2Al+\dfrac{3}{2}O_2\)
b)
\(Fe+\dfrac{3}{2}Cl_2\rightarrow FeCl_3\\ FeCl_3+3NaOH\rightarrow Fe\left(OH\right)_3+3NaCl\\ 2Fe\left(OH\right)_3\underrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3H_2\underrightarrow{t^o}2Fe+3H_2O\)
$FeCl_3 + 3AgNO_3 \to 3AgCl + Fe(NO_3)_3$
$Fe(NO_3)_3 + 3KOH \to Fe(OH)_3 + 3KNO_3$
$2Fe(OH)_3 \xrightarrow{t^o} Fe_2O_3 + 3H_2O$