:Thực hiện chuỗi phản ứng hóa học sau: a/ Na2O → NaOH → Na2SO4 → NaCl → NaNO3 b/ CuO → CuSO4 → Cu(OH)2→ CuCl2 → Cu(NO3)2 c/ Fe → FeSO4 → FeCl2 → Fe(OH)2 → FeO

2 câu trả lời

`a)`

`Na_2O → NaOH → Na_2SO_4 → NaCl → NaNO_3`

`Na_2O + H_2O to 2NaOH`

`2NaOH + Cu_SO_4 to Cu(OH)_2↓+ Na_2SO_4`

` Na_2SO_4 + BaCl_2 to  2NaCl + BaSO_4↓`

`NaCl+ Ag(NO)_3 to AgCl↓ + NaNO_3`

`b)`

`CuO → CuSO_4 → Cu(OH)_2→ CuCl_2 → Cu(NO_3)_2`

`Cu + H_2SO_4to CuSO_4 +H_2O`

`CuSO_4+ 2NaOHto Cu(OH)_2↓ + Na_2SO_4`

`Cu(OH)_2 +2HCl to 2H_2O + CuCl_2`

`CuCl_2 + 2AgNO_3to Cu(NO_3)_2+2AgCl↓` 

`c)`

`Fe → FeSO_4 → FeCl_2 → Fe(OH)_2 → FeO`

` Fe + CuSO_4 to FeSO_4 + Cu`

` FeSO_4 + BaCl_2to FeCl_2 + BaSO_4↓`

`FeCl_2 + 2NaOH  to Fe(OH)_2 +2NaCl`

` Fe(OH)_2 to FeO + H_2O`

a) 

(1) H2O+Na2O→2NaOH

(2) 2NaOH + H2SO4 → Na2SO4 + 2H2O

(3) Na2SO4 + BaCl2 → BaSO4 + 2NaCl

(4) AgNO3+NaCl→AgCl↓+NaNO3

b)

(1) CuO+H2SO4=CuSO4+H2O

(2) 2NaOH+CuSO4→Cu(OH)2↓+Na2SO4

(3) Cu(OH)2+2HCl→2H2O+CuCl2

(4) $CuCl_{2}$ + $2AgNO_{3}$ -> 2AgCl ↓+ $Cu(NO_{3}$)2

c) 

(1) Fe+Fe2(SO4)3→3FeSO4

(2) FeSO4 + 2HCl → FeCl2 + H2SO4

(3) FeCl2+2NaOH→2NaCl+Fe(OH)2

(4) Fe(OH)2→FeO+H2O

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