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22 tháng 12 2017

(1) 2Fe + 3Cl2 -t0-> 2FeCl3

(2) FeCl3 + 3NaOH - > Fe(OH)3\(\downarrow\) + 3NaCl

(3) \(2Fe\left(OH\right)3-^{t0}->Fe2O3+3H2O\)

(4) \(Fe2O3+3H2SO4->Fe2\left(SO4\right)3+3H2O\)

23 tháng 12 2017

(1) 2Fe + 3Cl2 \(\rightarrow\) 2FeCl3

(2) FeCl3 + 3NaOH \(\rightarrow\) Fe(OH)3 + 3NaCl

(3) 2Fe(OH)3 \(\rightarrow\) Fe2O3 + 3H2O

(4) Fe2O3 + 3H2SO4 \(\rightarrow\) Fe2(SO4)3 + 3H2O

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↓

17 tháng 12 2017

(1) 2Na+2H2O--->2NaOH+H2

(2) 3NaOH+Al(NO3)3--->Al(OH)3+3NaNO3

(3) 2Al(OH)3--->Al2O3+3H2O

(4) 2Al2O3-đpnc---> 4Al+3O2

(5) 2Al+3H2SO4--->Al2(SO4)3+3H2

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

17 tháng 12 2017

(1) 2Na+2H2O->2NaOH+H2

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

(3) 2Al(OH)3->Al2O3+3H2O

(4) 2Al2O3-điện phân nóng chảy->4Al+3O2

(5) 2Al+3H2SO4->Al2(SO4)3+3H2

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

9 tháng 12 2019

1) Al\(_2\)(SO\(_4\))\(_3\)+3BaCl\(_2\)→2AlCl\(_3\)+3BaSO\(_4\)

2)AlCl\(_3\)+3AgNO\(_3\)→Al(NO\(_3\))\(_3\)+3AgCl↓

3)Al(NO\(_3\))\(_3\)+3NaOH→Al(OH)\(_3\)+3NaNO\(_3\)

4)2Al(OH)\(_3\)\(\underrightarrow{to}\)Al2O3+3H2O

5)2Al2O3\(\xrightarrow[criolit]{đpnc}\)4Al+3O2

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

16 tháng 4 2016

(1) S+02===> S02 ( Nhiệt độ)

(2) 2SO2+ 02===> 2S03( ĐIỀU KIỆN V2O5, 450 độ)

(3) S03+ H20=====> H2S04

(4)3 H2S04+ 2Al====> Al2( S04)3+ 3/2H2 

(5) ZnO+ H2===> Zn+ H20

(6) Zn+ HCl=====> ZnCl2+ H2

theo tớ nghĩ thôi nhá

 

11 tháng 9 2018

a(1),fe+2hcl->fecl2+h2 (2) fecl2+ba(oh)2->fe(oh)2+bacl2 (3)fe(oh)2+h2so4->feso4+2h20 (4)feso4+bacl2->fecl2+baso4

11 tháng 9 2018

b.(1)2fe+3cl2->2fecl3 (2)2fecl3+3ba(oh)2->2fe(oh)3+3bacl2 (3)2fe(oh)3+o2->fe2o3+h2o (4)fe2o3+3co->2fe+3co2

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

 

21 tháng 12 2017

(1) Cu(OH)2 -t0-> CuO + H2O

(2) CuO + H2 -t0-> Cu + H2O

(3) Cu + Cl2 -t0-> CuCl2

(4) CuCl2 + 2NaOH - > Cu(OH)2 + 2NaCl

(5) Cu(OH)2 + H2SO4 - > CuSO4 + 2H2O

11 tháng 10 2019

Cái nhóm (OH)2 thì xem như là 2 nguyên tử O và 2 nguyên tử H để cân bằng đúng ko ạ?

5 tháng 10 2018

a) 1: Na + O2 \(\rightarrow\) Na2O

2: Na2O + H2O \(\rightarrow\) 2NaOH

3: NaOH + SO3 \(\rightarrow\) Na2SO4 + H2O

4: Na2SO4 + BaCl2 \(\rightarrow\) NaCl + BaSO4

5 tháng 10 2018

b) 1: CaO + H2O \(\rightarrow\) Ca(OH)2

2: Ca(OH)2 + H2CO3 \(\rightarrow\) CaCO3 + 2H2O

3: CaCO3 \(\underrightarrow{t^o}\) CaO + CO2

4: CaO + HCl \(\rightarrow\) CaCl2 + H2O