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6 tháng 4 2020

Dùng NaOH

FeSO4: Tạo kết tủa trắng xanh

Fe2(SO4)3: Tạo kết tủa nâu đỏ

MgCl2: Tạo kết tủa trắng

Cu(NO3)2: Tạo kết tủa xanh lam

Al(NO3)3: Tạo kết tủa trắng keo sau đó tan dần

20 tháng 10 2016

Fe →(1) Fe2(SO4)3 →(2) Fe(OH)3 →(3) Fe2O3 →(4) Fe(NO3)3

(1) 2Fe + 3H2SO4 → Fe2(SO4)3 + 3H2

(2) Fe2(SO4)3 + 6NaOH -> 3Na2SO4 + 2Fe(OH)3

(3) 2Fe(OH)3 t○ Fe2O3 + 3H2O

(4) Fe2O3 + 6HNO3 -> 2Fe(NO3)3 + 3H2O

 

26 tháng 7 2019
https://i.imgur.com/w056NxZ.jpg
11 tháng 7 2019

1) Cu + 4HNO3 → Cu(NO3)2 + 2NO2 + 2H2O

2) Al + 4HNO3 → Al(NO3)3 + NO + 2H2O

3) Al + 6HNO3 → Al(NO3)3 + 3NO2 + 3H2O

4) 2Fe + 6H2SO4 → Fe2(SO4)3 + 3SO2 + 6H2O

26 tháng 6 2018

ngu vl

22 tháng 6 2018

ko ra thì phải

1) \(Al\xrightarrow[]{\left(1\right)}Al_2O_3\xrightarrow[]{\left(2\right)}AlCl_3\xrightarrow[]{\left(3\right)}Al\left(OH\right)_3\) 2) \(Al\xrightarrow[]{\left(1\right)}AlCl_3\xrightarrow[]{\left(2\right)}Al\left(OH\right)_3\xrightarrow[]{\left(3\right)}Al_2O_3\) 3) \(Fe\xrightarrow[]{\left(1\right)}FeSO_4\xrightarrow[]{\left(2\right)}FeCl_2\xrightarrow[]{\left(3\right)}Fe\left(OH\right)_2\xrightarrow[]{\left(4\right)}FeO\) 4)...
Đọc tiếp

1) \(Al\xrightarrow[]{\left(1\right)}Al_2O_3\xrightarrow[]{\left(2\right)}AlCl_3\xrightarrow[]{\left(3\right)}Al\left(OH\right)_3\)

2) \(Al\xrightarrow[]{\left(1\right)}AlCl_3\xrightarrow[]{\left(2\right)}Al\left(OH\right)_3\xrightarrow[]{\left(3\right)}Al_2O_3\)

3) \(Fe\xrightarrow[]{\left(1\right)}FeSO_4\xrightarrow[]{\left(2\right)}FeCl_2\xrightarrow[]{\left(3\right)}Fe\left(OH\right)_2\xrightarrow[]{\left(4\right)}FeO\)

4) \(Fe\left(OH\right)_2\xrightarrow[]{\left(1\right)}FeO\xrightarrow[]{\left(2\right)}FeSO_4\xrightarrow[]{\left(3\right)}FeCl_2\xrightarrow[]{\left(4\right)}Fe\left(OH\right)_2\)

5) \(Fe\xrightarrow[]{\left(1\right)}FeCl_2\xrightarrow[]{\left(2\right)}Fe\left(NO_3\right)_2\xrightarrow[]{\left(3\right)}Fe\left(OH\right)_2\xrightarrow[]{\left(4\right)}FeSO_4\)

6) \(Fe\xrightarrow[]{\left(1\right)}FeCl_3\xrightarrow[]{\left(2\right)}Fe\left(OH\right)_3\xrightarrow[]{\left(3\right)}Fe_2\left(SO_4\right)_3\xrightarrow[]{\left(4\right)}FeCl_3\)

7) \(Fe\left(NO_3\right)_3\xrightarrow[]{\left(1\right)}Fe\left(OH\right)_3\xrightarrow[]{\left(2\right)}Fe_2O_3\xrightarrow[]{\left(3\right)}Fe\xrightarrow[]{\left(4\right)}FeCl_3\)

8) \(Fe_2\left(SO_4\right)_3\xrightarrow[]{\left(1\right)}Fe\left(OH\right)_3\xrightarrow[]{\left(2\right)}Fe_2O_3\xrightarrow[]{\left(3\right)}Fe_2\left(SO_4\right)_3\xrightarrow[]{\left(4\right)}FeCl_3\)

2
5 tháng 12 2019

1

1)4 Al+3O2→2Al2O3

(2)Al2O3+6HCl→2AlCl3+3H2O

(3)AlCl3+3NaOH→Al(OH)3+3NaCl

2

4Al+3O2→2Al2O3

Al2O3+6HCl→2AlCl3+3H2O

AlCl3+3NaOH→Al(OH)3+3NaCl

3

Fe+H2SO4→FeSO4+H2

(2)FeSO4+BaCl2→FeCl2+BaSO4

(3)FeCl2+2NaOH→Fe(OH)2+2NaCl

(4)Fe(OH)2→FeO+H2O

4

Fe+H2SO4→FeSO4+H2

FeSO4+BaCl2→FeCl2+BaSO4

FeCl2+2NaOH→Fe(OH)2+2NaCl

Fe(OH)2→FeO+H2O

5

Fe+2HCl→FeCl2+H2

(2)FeCl2+2AgNO3→Fe(NO3)2+2AgCl

(3)Fe(NO3)2+2NaOH→Fe(OH)2+2NaNO3

(4)Fe(OH)2+MgSO4→FeSO4+Mg(OH)2

5 tháng 12 2019

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

Câu 1 ) A / Mg(NO3) \(\underrightarrow{\left(1\right)}\) Mg(OH)2 \(\underrightarrow{\left(2\right)}\) MgCl2\(\underrightarrow{\left(3\right)}\) KCl \(\underrightarrow{\left(4\right)}\) KNO3 B/...
Đọc tiếp

Câu 1 ) A / Mg(NO3) \(\underrightarrow{\left(1\right)}\) Mg(OH)2 \(\underrightarrow{\left(2\right)}\) MgCl2\(\underrightarrow{\left(3\right)}\) KCl \(\underrightarrow{\left(4\right)}\) KNO3

B/ \(Na\underrightarrow{\left(1\right)}Na_2O\underrightarrow{\left(2\right)}NaOH\underrightarrow{\left(3\right)}Na_2SO_4\underrightarrow{\left(4\right)}NaCl\underrightarrow{\left(5\right)}NaNO_3\underrightarrow{\left(6\right)}NaCl\underrightarrow{\left(7\right)}NaOH\)

C/\(Mg\underrightarrow{\left(1\right)}MgO\underrightarrow{\left(2\right)}MgCl_2\underrightarrow{\left(3\right)}Mg\left(NO_3\right)_2\underrightarrow{\left(4\right)}Mg\left(OH\right)_2\underrightarrow{\left(5\right)}MgSO_4\underrightarrow{\left(6\right)}MgCO_3\)

D/\(CuSO_4\underrightarrow{\left(1\right)}Cu\left(OH\right)_2\underrightarrow{\left(2\right)}CuO\underrightarrow{\left(3\right)}CuCl_2\underrightarrow{\left(4\right)}Cu\left(OH\right)_2\underrightarrow{\left(5\right)}CuSO_4\)

E/\(CuCl_2\underrightarrow{\left(1\right)}Cu\left(OH\right)_2\underrightarrow{\left(2\right)}CuSO_4\underrightarrow{\left(3\right)}Cu\underrightarrow{\left(4\right)}CuO\)

F/ \(Cu\left(OH\right)_2\underrightarrow{\left(1\right)}CuO\underrightarrow{\left(2\right)}CuCl_2\underrightarrow{\left(3\right)}Cu\left(NO_3\right)_2\underrightarrow{\left(4\right)}NaNO_3\)

G/\(Fe_2O_3\underrightarrow{\left(1\right)}FeCl_3\underrightarrow{\left(2\right)}Fe\left(OH\right)_3\underrightarrow{\left(3\right)}Fe_2O_3\underrightarrow{\left(4\right)}Fe_2\left(SO_4\right)_3\)

H/ \(ZnCl_2\underrightarrow{\left(1\right)}Zn\left(OH\right)_2\underrightarrow{\left(2\right)}ZnCl_2\underrightarrow{\left(3\right)}NaCl\underrightarrow{\left(4\right)}NaNO_3\)

M/\(CuO\underrightarrow{\left(1\right)}CuCl_2\underrightarrow{\left(2\right)}Cu\left(OH\right)_2\underrightarrow{\left(3\right)}CuO\underrightarrow{\left(4\right)}CuSO_4\)

N/\(Fe\left(OH\right)_2\underrightarrow{\left(1\right)}FeO\underrightarrow{\left(2\right)}FeCl_2\underrightarrow{\left(3\right)}Fe\left(ỌH_2\right)\underrightarrow{\left(4\right)}FeSO_4\underrightarrow{\left(5\right)}FeCl_2\underrightarrow{\left(6\right)}Fe\left(NO_3\right)_2\)

Z/ \(Mg\left(OH\right)_2\underrightarrow{\left(1\right)}MgO\underrightarrow{\left(2\right)}MgSO_4\underrightarrow{\left(3\right)}MgCl_2\underrightarrow{\left(4\right)}Mg\left(OH\right)_2\underrightarrow{\left(5\right)}MgCl_2\underrightarrow{\left(6\right)}Mg\left(NO_3\right)_2\)

X/\(Al\left(OH\right)_3\underrightarrow{\left(1\right)}Al_2O_3\underrightarrow{\left(2\right)}AlCl_3\underrightarrow{\left(3\right)}Al\underrightarrow{\left(4\right)}Al_2\left(SO_4\right)_3\)

11
7 tháng 11 2018

g) 1. Fe2O3 + 6HCl → 2FeCl3 + 3H2O

2. FeCl3 + 3NaOH → 3NaCl + Fe(OH)3

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

4. Fe2O3 + 3H2SO4 → Fe2(SO4)3 + 3H2O

7 tháng 11 2018

h) 1. ZnCl2 + 2NaOH → 2NaCl + Zn(OH)2

2. Zn(OH)2 + 2HCl → ZnCl2 + 2H2O

3. ZnCl2 + 2NaOH → 2NaCl + Zn(OH)2

4. NaCl + AgNO3 → NaNO3 + AgCl↓

8 tháng 10 2020

3Fe + 2O2 ➝ Fe3O4

Fe3O4 + 8HCl ➝ FeCl2 + 2FeCl3 + 4H2O

2FeCl2 + Cl2 ➝ 2FeCl3

FeCl3 + 3AgNO3 ➝ Fe(NO3)3 + 3AgCl↓

Fe(NO3)3 + 3NaOH ➝Fe(OH)3 + 3NaNO3

2Fe(OH)3 \(\underrightarrow{t^o}\) Fe2O3 + 3H2O