4Al+3O₂----t^o--->2Al₂O₃

Al₂O₃ +3H₂SO₄----->Al₂(SO₄)₃+3H₂O

Al₂(SO₄)₃+3BaCl₂------>2AlCl₃+3BaSO₄

2AlCl₃+3Ca(OH)₂---->2Al(OH)₃+3CaCl₂

Al(OH)₃+3HNO₃---->Al(NO₃)₃+3H₂O

2Al(NO₃)₃+3Mg----->3Mg(NO₃)₂+2Al

2Al+3H₂SO₄------->Al₂(SO₄)₃+3H₂

Al₂(SO₄)₃+3Ca(OH)₂------>2Al(OH)₃+3CaSO₄

2Al(OH)₃-----t^o----->Al₂O₃+3H₂O

2Al₂O₃----\(\dfrac{t^o}{criolit}\)---->4Al+3O₂

2Al+2H₂O+2NaOH------>2NaAlO₂+3H₂

4Al+3O₂\(\underrightarrow{t^o}\) 2Al₂O₃

Al₂O₃+H₂SO₄ —> Al₂(SO₄)₃+3H₂O

Al₂(SO₄)₃+3BaCl₂–>3BaSO₄\(\downarrow\)+2AlCl₃

AlCl₃+3NaOH—>Al(OH)₃\(\downarrow\)+3NaCl

Al(OH)₃+HNO₃ —>Al(NO₃)₃+NO₂\(\uparrow\)+H₂O

2Al(NO₃)₃+3Mg—>3Mg(NO₃)₂+2Al\(\downarrow\)

2Al+3H₂SO₄–>Al₂(SO₄)₃+3H₂\(\uparrow\)

Al₂(SO₄)₃+6NaOH—>2Al(OH)₃+3Na₂SO₄

2Al(OH)₃\(\underrightarrow{t^o}\)Al₂O₃+3H₂O

2Al₂O₃\(\xrightarrow[criolit]{đien.phan.nong.chay}\)

4Al+3O₂

2Al+2NaOH+2H₂O—>2NaAlO₂+3H₂

\(\begin{array}{l} 4Al+3O_2\xrightarrow{t^o} 2Al_2O_3\\ Al_2O_3+3H_2SO_4\to Al_2(SO_4)_3+3H_2O\\ Al_2(SO_4)_3+3BaCl_2\to 3BaSO_4\downarrow+2AlCl_3\\ AlCl_3+3NaOH\to Al(OH)_3\downarrow+3NaCl\\ Al(OH)_3+3HNO_3\to Al(NO_3)_3+3H_2O\\ 2Al(NO_3)_3+3Mg\to 3Mg(NO_3)_2+2Al\\ 2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\uparrow\\ Al_2(SO_4)_3+6NaOH\to 2Al(OH)_3\downarrow+3Na_2SO_4\\ 2Al(OH)_3\xrightarrow{t^o} Al_2O_3+3H_2O\\ 2Al_2O_3\xrightarrow{\text{đpnc, Criolit}} 4Al+3O_2\uparrow\\ 2Al+2NaOH+2H_2O\to 2NaAlO_2+3H_2\uparrow\end{array}\)

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

\(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

\(Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow2AlCl_3+3BaSO_4\)

\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)

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

\(2NaOH+Al_2O_3\rightarrow2NaAlO_2+H_2O\)

(1) \(2Al+3Cl_2\xrightarrow[]{t^\circ}2AlCl_3\)

(2) \(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3\downarrow+3NaCl\)

(3) \(2Al\left(OH\right)_3\xrightarrow[]{t^\circ}Al_2O_3+3H_2O\uparrow\)

(4) \(2Al_2O_3\xrightarrow[]{\text{đpnc}}4Al+3O_2\uparrow\)

\(4Al+3O_2\rightarrow2Al_2O_3\)

\(Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

\(Al_2\left(SO_4\right)_3+3BaCl_2\rightarrow2AlCl_3+3BaSO_4\downarrow\)

\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)

\(a,2Al_2O_3\rightarrow\left(đpnc,criolit\right)4Al+3O_2\\ 2Al+6HCl\rightarrow2AlCl_3+3H_2\\ AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\\ 2Al\left(OH\right)_3\rightarrow\left(t^o\right)Al_2O_3+3H_2O\\ Al_2O_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

\(b,2Cu+O_2\rightarrow\left(t^o\right)2CuO\\ CuO+2HCl\rightarrow CuCl_2+H_2O\\ CuCl_2+2KOH\rightarrow Cu\left(OH\right)_2+2KCl\\ Cu\left(OH\right)_2\rightarrow\left(t^o\right)CuO+H_2O\)

a) 

(1) 2Al + 6HCl --> 2AlCl₃ + 3H₂

(2) AlCl₃ + 3NaOH --> Al(OH)₃\(\downarrow\) + 3NaCl

(3) 2Al(OH)₃ + 3H₂SO₄ --> Al₂(SO₄)₃ + 6H₂O

(4) Al₂(SO₄)₃+ 3Ba(NO₃)₂ --> 2Al(NO₃)₃ + 3BaSO₄\(\downarrow\)

b)

(1) 2Na + 2H₂O --> 2NaOH + H₂

(2) 2NaOH + H₂SO₄ --> Na₂SO₄ + 2H₂O

(3) Na₂SO₄ + BaCl₂ --> BaSO₄\(\downarrow\) + 2NaCl

(4) NaCl + AgNO₃ --> NaNO₃ + AgCl\(\downarrow\)

c) 

(1) 2Mg + O₂ --t^o--> 2MgO

(2) MgO + 2HCl --> MgCl₂ + H₂O

(3) MgCl₂ + 2NaOH --> Mg(OH)₂\(\downarrow\) + 2NaCl

(4) Mg(OH)₂ + H₂SO₄ --> MgSO₄ + 2H₂O

a)\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

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

\(2Al\left(OH\right)_3+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2O\)

\(Al_2\left(SO_4\right)_3+3Ba\left(NO_3\right)_2\rightarrow2Al\left(NO_3\right)_3+3BaSO_4\)

b)\(2Na+2H_2O\rightarrow2NaOH+H_2\)

\(2NaOH+H_2SO_4\rightarrow Na_2SO_4+2H_2O\)

\(Na_2SO_4+BaCl_2\rightarrow2NaCl+BaSO_4\)

\(NaCl+HNO_3\rightarrow NaNO_3+HCl\)

Câu c em tự luyện tập nhé!!!

(1) \(4Al+3O_2-t^o-2Al_2O_3\)

(2) \(Al_2O_3+6HCl-->2AlCl_3+3H_2O\)

(3) \(AlCl_3+3AgNO_3-->3AgCl\downarrow+Al\left(NO_3\right)_3\)

(4) \(Al\left(NO_3\right)_3+3NaOH-->3NaNO_3+Al\left(OH\right)_3\downarrow\)

(1)  \(4Al+3O_2-t^o->2Al_2O_3\)

(2)  \(Al_2O_3+6HCl-->2AlCl_3+3H_2\uparrow\)

(3)  \(AlCl_3+3NaOH-->Al\left(OH\right)_3\downarrow+3NaCl\)

\(a,2Fe+3Cl_2\xrightarrow{t^o}2FeCl_3\\ FeCl_3+3NaOH\to Fe(OH)_3\downarrow+3NaCl\\ 2Fe(OH)_3\xrightarrow{t^o}Fe_2O_3+3H_2O\\ Fe_2O_3+3CO\xrightarrow{t^o}2Fe+3CO_2\\ Fe+H_2SO_4\to FeSO_4+H_2\\ FeSO_4+BaS\to BaSO_4\downarrow+FeS\\ FeS+2HCl\to FeCl_2+H_2\\ FeCl_2+2AgNO_3\to Fe(NO_3)_2+2AgCl\downarrow\)

\(b,2Al_2O_3\xrightarrow[criolit]{đpnc}4Al+3O_2\\ 2Al+3H_2SO_4\to Al_2(SO_4)_3+3H_2\\ Al_2(SO_4)_3+6NaOH\to 2Al(OH)_3\downarrow+3Na_2SO_4\\ Al(OH)_3+3HNO_3\to Al(NO_3)_3+3H_2O\\ 2Al(NO_3)_3+3Mg\to 3Mg(NO_3)_2+2Al\\ Al+NaOH+H_2O\to NaAlO_2+\dfrac{3}{2}H_2\)