a)\(4Al+3O_2\underrightarrow{t^o}2Al_2O_3\)

   \(Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)

   \(2AlCl_3+3Ba\left(OH\right)_2\rightarrow2Al\left(OH\right)_3\downarrow+3BaCl_2\)

   \(2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\)

   \(2Al+3S\underrightarrow{t^o}Al_2S_3\)

1, (1) 4Al+ 3O2--(to)---> 2Al2O3

(2) Al2O3+6HCl---> 2AlCl3+ 3H2O

(3) AlCl3+3NaOH---->Al(OH)3+ 3NaCl

(4) 2Al(OH)3---(t^o)---> Al2O3+ 3H2O

(5)2Al2O3---(t^o+ đpnc)--> 4Al+ 3O2

(6) 2Al+ 3Cl2---> 2AlCl3

2, (1)Fe+ CuSO4-->Cu+ FeSO4

(2) FeSO4+ 2NaOH--> Fe(OH)2+ Na2SO4

(3) Fe(OH)2 +2HCl---> FeCl2+ 2H2O

Bài cuối tự làm nhé!

câu 3

2Al + 3Cl2 --t--> 2AlCl3

AlCl3 + 3NaOH -> 3NaCl + Al(OH)3

2Al(OH)3 -t-> Al2O3 + H2O

Al2O3 + 3H2SO4 -> Al2(SO4)3 + 3H2O

Al2(SO4)3 + 3BaCl2 -> 3BaSO4 + 2AlCl3

2AlCl3 + 3Mg -> 2Al + 3MgCl2

\(\left(1\right)4Al+3O_2\underrightarrow{t^o}2Al_2O_3\\ \left(2\right)Al_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\\ AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3\downarrow+3NaCl\\ 2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\\ 2Al_2O_3\underrightarrow{dpnc}4Al+3O_2\\ 2Al+6HCl\rightarrow2AlCl_3+3H_2\)

1) Al\(_2\)(SO\(_4\))\(_3\)+3BaCl\(_2\)→2AlCl\(_3\)+3BaSO\(_4\)↓

2)AlCl\(_3\)+3AgNO\(_3\)→Al(NO\(_3\))\(_3\)+3AgCl↓

3)Al(NO\(_3\))\(_3\)+3NaOH→Al(OH)\(_3\)+3NaNO\(_3\)

4)2Al(OH)\(_3\)\(\underrightarrow{to}\)Al₂O₃+3H₂O

5)2Al₂O₃\(\xrightarrow[criolit]{đpnc}\)4Al+3O₂

(1) 2Al(OH)3--^to--->Al2O3+3H2O

(2) 2Al2O3---dpnc-->4Al+3O2

(3) 2Al+6H2SO4--^to-->Al2(SO4)3+6H2O+3SO2

(4) Al2(SO4)3+3BaCl2---->2AlCl3+3BaSO4

\(\text{Al2O3+6HCl->2AlCl3+3H2O}\)

\(\text{AlCl3+3AgNO3->3AgCl+Al(NO3)3}\)

\(\text{Al(NO3)3+3NaOH->Al(OH)3+3NaNO3}\)

\(\text{Al(OH)3+NaOH->NaAlO2+2H2O}\)

Al2O3+6HCl---->2AlCl3+3H2O

AlCl3+3AgNO3----->Al(NO3)3+3AgCl

Al(NO3)3+3NaOH---->3NaNO3+Al(OH)3

Al(OH)3+NaOH---->NaAlO2+2H2O

Nhầm @@

\(Al\left(NO_3\right)_3\)

a) 4FeS₂+11O₂\(\overset{t^0}{\rightarrow}\)2Fe₂O₃+8SO₂

2SO₂+O₂\(\overset{V_2O_5,t^0}{\rightarrow}2SO_3\)

SO₃+H₂O\(\rightarrow\)H₂SO₄

Cu+ 2H₂SO_4đ\(\overset{t^0}{\rightarrow}\)CuSO₄+SO₂+H₂O

b)

AlCl₃+3NaOH\(\rightarrow\)Al(OH)₃+3NaCl

2Al(OH)₃\(\overset{t^0}{\rightarrow}Al_2O_3+3H_2O\)

Al₂O₃+3H₂SO₄\(\rightarrow\)Al₂(SO₄)₃+3H₂O

Al₂(SO₄)₃+3BaCl₂\(\rightarrow\)3BaSO₄+2AlCl₃

c) 4Na+O₂\(\overset{t^0}{\rightarrow}2Na_2O\)

Na₂O+H₂O\(\rightarrow\)2NaOH

2NaOH+CO₂\(\rightarrow\)Na₂CO₃+H₂O

Na₂CO₃+CO₂+H₂O\(\rightarrow\)2NaHCO₃

\(1\\ 2Al\left(OH\right)_3\rightarrow\left(t^o\right)Al_2O_3+3H_2O\\ 2\\ Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\\ Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow3BaSO_4+2AlCl_3\)

Chất thứ 2 trong sơ đồ phải là Al₂O₃ bạn nhé!

\(2Al\left(OH\right)_3\underrightarrow{t^o}Al_2O_3+3H_2O\)

\(2Al_2O_3\underrightarrow{đpnc}4Al+3O_2\)

\(2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\)

\(Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow2AlCl_3+3BaSO_{4\downarrow}\)

Bạn tham khảo nhé!

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Câu 1 :

( 1 ) 4Al + 3O2 → 2Al2O3 ( Nhiệt độ )

( 2 ) Al2O3 + 6HCl → 2AlCl3 + 3H2O

( 3 ) AlCl3 + 3NaOH → Al(OH)3 + 3NaCl

Câu 2 :

( 1 ) 2Al + 6HCl → 2AlCl3 + 3H2

( 2 ) AlCl3 + 3NaOH → Al(OH)3 + 3NaCl

( 3 ) 2Al(OH)3 → Al2O3 + 3H2O ( Nhiệt độ )

Câu 3 :

( 1 ) Fe + H2SO4 → H2 + FeSO4

( 2 ) BaCl2 + FeSO4 → FeCl2 + BaSO4

( 3 ) FeCl2 + 2NaOH → NaCl + Fe(OH)2

( 4 ) Fe(OH)2 → FeO + H2O ( Nhiệt độ )

Câu 4 :

( 1 ) Fe(OH)2 → FeO + H2O ( Nhiệt độ )

( 2 ) FeO + H2SO4 → H2O + FeSO4

( 3 ) BaCl2 + FeSO4 → FeCl2 + BaSO4

( 4 ) FeCl2 + 2NaOH → NaCl + Fe(OH)2

Câu 5 :

( 1 ) Fe + 2HCl → FeCl2 + H2

( 2 ) 2AgNO3 + FeCl2 → 2AgCl + Fe(NO3)2

( 3 ) Fe(NO3)2 + NaOH → NaNO3 + Fe(OH)2

( 4 ) H2SO4 + Fe(OH)2 → 2H2O + FeSO4

Câu 6 :

( 1 ) 3Cl2 + 2Fe → 2FeCl3 ( Nhiệt độ )

( 2 ) 3NaOH + FeCl3 → 3NaCl + Fe(OH)3

( 3 ) 3H2SO4 + 2Fe(OH)3 → Fe2(SO4)3 + 6H2O

( 4 ) 3BaCl2 + Fe2(SO4)3 → 2FeCl3 + 3BaSO4

Câu 7 :

( 1 ) 3NaOH + Fe(NO3)3 → 3NaNO3 + Fe(OH)3

( 2 ) 2Fe(OH)3 → Fe2O3 + 3H2O ( Nhiệt độ )

( 3 ) 2Al + Fe2O3 → Al2O3 + 2Fe

( 4 ) 3Cl2 + 2Fe → 2FeCl3 ( Nhiệt độ )

Câu 8 :

( 1 ) Fe2(SO4)3 + 6NaOH → 3Na2SO4 + 2Fe(OH)3

( 2 ) 2Fe(OH)3 → Fe2O3 + 3H2O ( Nhiệt độ )

( 3 ) Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O

( 4 ) 3BaCl2 + Fe2(SO4)3 → 2FeCl3 + 3BaSO4