Question

Viết các PTHH thực hiện các chuỗi biến hóa sau ghi rõ điều kiện phản ứng nến có

a) S-SO₂-SO₃-H₂SO₄-Na₂SO₄-BaSO₄

b)SO₂-NaSO₃-Na₂SO₄-NaOH-Na₂CO₃

c) CaO-CaCO₃-CaO-Ca(OH)₂-CaCO₃-CaSO₄

d)Fe-FeCl₃-Fe(OH)₃-Fe₂O₃-Fe₂(SO₄)₃-FeCl₃

e)Fe-FeCl₂-Fe(NO₃)₂-Fe(OH)₂-FeSO₄

f)Cu-CuO-CuCl₂-Cu(OH)₂-CuO-Cu-CuSO₄

g)Al₂O₃- Al- AlCl₃- NaCl- NaOH- Cu(OH)₂

help me mai có tiết ạ

Answer 1

a) S + O₂ \(\underrightarrow{to}\) SO₂

2SO₂ + O₂ \(\underrightarrow{to}\) 2SO₃

SO₃ + H₂O → H₂SO₄

H₂SO₄ + 2NaOH → Na₂SO₄ + 2H₂O

Na₂SO₄ + BaCl₂ → BaSO₄↓ + 2NaCl

Answer 2

b) SO₂ + 2NaOH → Na₂SO₃ + H₂O

Na₂SO₃ + H₂SO₄ → Na₂SO₄ + SO₂↑ + H₂O

Na₂SO₄ + Ba(OH)₂ → 2NaOH + BaSO₄↓

2NaOH + CO₂ → Na₂CO₃ + H₂O

Answer 3

c) CaO + CO₂ → CaCO₃

CaCO₃ \(\underrightarrow{to}\) CaO + CO₂

CaO + H₂O → Ca(OH)₂

Ca(OH)₂ + CO₂ → CaCO₃ + H₂O

CaCO₃ + H₂SO₄ → CaSO₄ + CO₂↑ + H₂O

Answer 4

d) 2Fe + 3Cl₂ \(\underrightarrow{to}\) 2FeCl₃

FeCl₃ + 3NaOH → 3NaCl + Fe(OH)₃↓

2Fe(OH)₃ \(\underrightarrow{to}\) Fe₂O₃ + 3H₂O

Fe₂O₃ + 3H₂SO₄ → Fe₂(SO₄)₃ + 3H₂O

Fe₂(SO₄)₃ + 3BaCl₂ → 2FeCl₃ + 3BaSO₄↓

Answer 5

e) Fe + 2HCl → FeCl₂ + H₂↑

FeCl₂ + 2AgNO₃ → Fe(NO₃)₂ + 2AgCl↓

Fe(NO₃)₂ + 2NaOH → 2NaNO₃ + Fe(OH)₂↓

Fe(OH)₂ + H₂SO₄ → FeSO₄ + 2H₂O

Answer 6

f) 2Cu + O₂ \(\underrightarrow{to}\) 2CuO

CuO + 2HCl → CuCl₂ + H₂O

CuCl₂ + 2NaOH → 2NaCl + Cu(OH)₂↓

Cu(OH)₂ \(\underrightarrow{to}\) CuO + H₂O

CuO + CO \(\underrightarrow{to}\) Cu + CO₂

Cu + 2H₂SO₄ (đặc nóng) → CuSO₄ + SO₂↑ + 2H₂O

Answer 7

g) 2Al₂O₃ \(\underrightarrow{to}\) 4Al + 3O₂↑

2Al + 6HCl → 2AlCl₃ + 3H₂↑

AlCl₃ + 3NaOH → 3NaCl + Al(OH)₃↓

NaCl + AgOH → NaOH + AgCl↓

2NaOH + CuCl₂ → 2NaCl + Cu(OH)₂↓

Answer 8

a) S+O2---to-->SO2

2SO2+O2=>2SO3 (đk:V2O5,450 độ)

SO3+H2O=>H2SO4

H2SO4+2NaOH=>Na2SO4+2H2O

Na2SO4+Ba(OH)2=>BaSO4+2NaOH

b)SO2+2NaOH=>Na2SO3+H2O

Na2SO3+H2SO4=>Na2SO4+SO2+H2O

Na2SO4+Ba(OH)2=>BaSO4+2NaOH

2NaOH+CO2=>Na2CO3+H2O

c)CaO+CO2=>CaCO3

CaCO3---to-->CaO+CO2

CaO+H2O=>Ca(OH)2

Ca(OH)2+CO2=>CaCO3+H2O

CaCO3+H2SO4=>CaSO4+H2O+SO2

d)2Fe+3Cl2=>2FeCl3

FeCl3+3NaOH=>Fe(OH)3+3NaCl

2Fe(OH)3---to-->Fe2O3+3H2O

Fe2O3+3H2SO4=>Fe2(SO4)3+3H2O

Fe2(SO4)3+6HCl=>2FeCl3+3H2SO4

e)Fe+2HCl=>FeCl2+H2

FeCl2+2AgNO3=>2AgCl+Fe(NO3)2

Fe(NO3)+2NaOH=>Fe(OH)2+2NaNO3

Fe(OH)2+H2SO4=>FeSO4+2H2O

f)2Cu+O2--to-->2CuO

CuO+2HCl=>CuCl2+H2O

CuCl2+2NaOH=>Cu(OH)2+2NaCl

Cu(OH)2----to-->CuO+H2O

CuO+H2---to-->Cu+H2O

Cu+2H2SO4(đ)----to--->CuSO4+SO2+2H2O

g)2Al2O3---->4Al+3O2 ( điều kiện: chất xúc tác cryonit,đpnc)

2Al+6HCl=>2AlCl3+3H2

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

2NaCl+2H2O=>2NaOH+Cl2+H2 (điện phân dd có màng ngăn)

2NaOH+CuCl2=>2NaCl+Cu(OH)2

good luck <3

nhớ tick cho mình nha <3