Question

Hoàn thành chuỗi phản ứng hóa học sau:

Al → Al₂O₃ → NaAlO₂ → Al(OH)₃ → Al₂(SO₄)₃ → AlCl₃ → Al(NO₃)₃

Answer 1

Đáp án + Giải thích các bước giải:

(1) 4Al + 3O2 → 2Al2O3 (dưới nhiệt độ)

(2) Al2O3 + 3NaOH → 2NaAlO2 + H2O

(3) NaAlO2 + 2H2O + CO2 → Al(OH)3↓ + NaHCO3

(4) 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 +  6H2O

(5) Al2(SO4)3 + BaCl2 → AlCl3 +  BaSO4

(6) AlCl3 + 3AgNO3 → 3AgCl↓ + Al(NO3)3

(7) 4Al(NO3)3 → 2Al2O3 + 12NO2↑ + O2↑

(8) 2Al2O3 → 4Al + 3O2↑

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Answer 2

(1) 4Al + 3O2 → 2Al2O3 (dưới nhiệt độ)

(2) Al2O3 + 3NaOH → 2NaAlO2 + H2O

(3) NaAlO2 + 2H2O + CO2 → Al(OH)3↓ + NaHCO3

(4) 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 +  6H2O

(5) Al2(SO4)3 + BaCl2 → AlCl3 +  BaSO4

(6) AlCl3 + 3AgNO3 → 3AgCl↓ + Al(NO3)3

(7) 4Al(NO3)3 → 2Al2O3 + 12NO2↑ + O2↑

(8) 2Al2O3 → 4Al + 3O2↑

Answer 3

(1)4Al + 3O2 --> 2Al2O3
(2) Al2O3 + 2NaOH --> 2NaAlO2 + H2O
(3) NaAlO2 + 2H2O --> Al(OH)3 + NaOH
(4) 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 + 6H2O
(5) Al2(SO4)3 + 3BaCl2 → 2AlCl3 + 3BaSO4 
(6) AlCl3 + 3AgNO3 → Al(NO3)3 + 3AgCl 
 

Answer 4

Al+O₂➙Al₂O₃
Al₂O₃+NaOH➙2NaAlO₂+H₂O
NaAlO₂+H₂O➙Al(OH)₃+NaOH
2Al(OH)₃+3H₂SO₄➙Al₂(SO₄)+3H₂O
Al₂(SO₄)₃+3BaCl₂➙2AlCl₃+3BaSO₄
AlCl₃+3AgNO₃➙Al(NO₃)₃+3AgCl

Answer 5

Al+0₂-Al₂O₃

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Answer 6

(1) 4Al + 3O2 → 2Al2O3 (dưới nhiệt độ)

(2) Al2O3 + 3NaOH → 2NaAlO2 + H2O

(3) NaAlO2 + 2H2O + CO2 → Al(OH)3↓ + NaHCO3

(4) 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 +  6H2O

(5) Al2(SO4)3 + BaCl2 → AlCl3 +  BaSO4

(6) AlCl3 + 3AgNO3 → 3AgCl↓ + Al(NO3)3

(7) 4Al(NO3)3 → 2Al2O3 + 12NO2↑ + O2↑

(8) 2Al2O3 → 4Al + 3O2↑

Answer 7

4Al   + 3O₂  → 2Al₂O₃ 

Al2O3 + 2NaOH + → H₂ + 2NaAlO2

NaAlO₂ + 2H₂O + CO₂ → Al(OH)₃ + NaHCO₃ 

 2Al(OH)3 +3H₂SO₄ →6H₂O + Al2(SO4)₃

Al₂(SO₄)₃ + 6NaCl  →  2AlCl₃ + 3Na₂SO₄

AlCl3 + 3HNO₃→ 3HCl + Al(NO3)3

Answer 8

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Answer 9

4Al + 3O₂  - > 2Al₂O₃

Al₂O₃ + 2NaOH - > 2NaAlO₂  + H₂O

NaAlO₂  + CO₂ + 2H₂O -> Al(OH)3    +     NaHCO₃

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

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

AlCl₃  + 3AgNO₃  -> Al(NO₃)₃    +  AgCl3

Answer 10

4Al + 3O₂ → 2Al₂O₃

Al₂O₃ + NaOH + H₂O → NaAlO₂ + \(\dfrac{\text{3}}{\text{\text{2}}}\)H₂

NaAlO₂ + CO₂ + 2H₂O → Al(OH)₃ + NaHCO₃ 

2Al(OH)₃ + 3H₂SO₄ → Al₂(SO₄)₃ + 3H₂O

Al₂(SO₄)₃ + 3BaCl₂ → 2AlCl₃ + 3BaSO₄ ↓

AlCl₃ + 3AgNO₃ → Al(NO₃)₃ + 3AgCl ↓

Answer 11

4Al+3O2--t*-->2Al2O3

Al2O3+2NaOH---->2NaAlO2+H2O

NaAlO2+2Ba(OH)2---->Al(OH)3+NaOH+2BaO

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

Al2(SO4)3+6HCl---->2AlCl3+3H2SO4

AlCl3+3KNO3---->Al(NO3)3+3KCl

Answer 12

(1) 4Al + 3O₂ t^o--> 2Al₂O₃

(2) Al₂O₃ + 2NaOH ---> 2NaAlO₂ + H₂O

(3) 2NaAlO₂ + CO₂ + 3H₂O ---> 2Al(OH)₃ ↓ + Na₂CO₃

(4) 2Al(OH)₃ + 3H₂SO₄ ---> Al₂(SO₄)₃ + 6H₂O

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

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

Answer 13

giải:

(1) 4Al + 3O2 → 2Al2O3 (dưới nhiệt độ)

(2) Al2O3 + 3NaOH → 2NaAlO2 + H2O

(3) NaAlO2 + 2H2O + CO2 → Al(OH)3↓ + NaHCO3

(4) 2Al(OH)3 + 3H2SO4 → Al2(SO4)3 +  6H2O

(5) Al2(SO4)3 + BaCl2 → AlCl3 +  BaSO4

(6) AlCl3 + 3AgNO3 → 3AgCl↓ + Al(NO3)3

(7) 4Al(NO3)3 → 2Al2O3 + 12NO2↑ + O2↑

(8) 2Al2O3 → 4Al + 3O2↑

Answer 14

1) 4Al + 3O2 → 2Al2O3

2) Al2O3 + 2NaOH → 2NaAlO2 + H2O

3) NaAlO2 + 2H2O → NaOH + Al(OH)3

4) 2Al(OH)3 + 3ZnSO4 → Al2(SO4)3 + 3Zn(OH)2

5) Al2(SO4)3 + 3BaCl2 → 2AlCl3 + 3BaSO4

6) AlCl3 + 3AgNO3 → Al(NO3)3 + 3AgCl

Answer 15

Al+O₂→Al₂O₃

 

Answer 16

1. 4Al + 3O2 => 2Al2O3
2. Al2O3 + 2NaOH => 2NaAlO2 + H2O
3. 2NaAlO2 + CO2 + 3H2O => 2Al(OH)3 + Na2CO3
4. 2Al(OH)3 + 3H2SO4 => Al2(SO4)3 + 3H2O
5. Al2(SO4)3 + 3BaCl2 => 2AlCl3 + 3BaSO4
6. AlCl3 + 3AgNO3 => Al(NO3)3 + 3AgCl