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29 tháng 11 2019

a) SO2 + Na2O -> Na2SO3

Na2SO3 + H2SO4 -> Na2SO4 + SO2 + H2O

Na2SO4 + Ba(OH)2 -> BaSO4 \(\downarrow\)+ 2NaOH

2NaOH + CO2 -> Na2CO3 + H2O

b) CaO + CO2 -> CaCO3

CaCO3 \(\rightarrow^{t^o}\) CaO + CO2

CaO + H2O -> Ca ( OH)2

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

CaCO3 + H2SO4 -> CaSO4 + CO2 + H2O

29 tháng 11 2019

c) 2Fe + 3Cl2 \(\rightarrow^{t^o}\) 2FeCl3

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

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

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

Fe2(SO4)3 + 3BaCl2 -> 2FeCl3 + 3BaSO4\(\downarrow\)

d) Fe + 2HCl -> FeCl2 + H2

FeCl2 + 2AgNO3 -> 2AgCl\(\downarrow\) + Fe(NO3)2

Fe(NO3)2 + 2NaOH -> Fe(OH)2\(\downarrow\) + 2NaNO3

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

8 tháng 11 2021

Bài 2 câu a sửa CaP thành CaO nhé, ghi nhầm..

25 tháng 9 2020

- Tác dụng với H2O: K, CO2, P2O5, SO3, SO2, CaO, N2O5

=> 7 chất

- Tác dụng với H2SO4: K, Al, CuO, Al(OH)3, Ba(OH)2, Na2CO3, AgNO3, Fe2O3, Ba(NO3)2, CaO, CaCO3, Al2O3, ZnO

=> 13 chất

- Tác dụng với NaOH: Al, Al(OH)3, CO2, P2O5, SO3, AgNO3, SO2, N2O5, Al2O3, ZnO

=> 10 chất

- Tác dụng với CuSO4: Al, Ba(OH)2, Na2CO3, AgNO3, Ba(NO3)2

=> 5 chất

9 tháng 1 2022

a) 

\(Fe+2HCl\rightarrow FeCl_2+H_2\)

\(Mg+2HCl\rightarrow MgCl_2+H_2\)

\(Zn+2HCl\rightarrow ZnCl_2+H_2\)

\(2Al+6HCl\rightarrow2AlCl_3+3H_2\)

b)

\(CuO+2HCl\rightarrow CuCl_2+H_2O\)

\(FeO+2HCl\rightarrow FeCl_2+H_2O\)

\(Fe_2O_3+6HCl\rightarrow2AlCl_3+3H_2O\)

c) \(KOH+HCl\rightarrow KCl+H_2O\)

\(Fe\left(OH\right)_2+2HCl\rightarrow FeCl_2+2H_2O\)

\(Fe\left(OH\right)_3+3HCl\rightarrow FeCl_3+3H_2O\)

d) 

\(NaOH+HCl\rightarrow NaCl+H_2O\)

\(AgNO_3+HCl\rightarrow AgCl+HNO3\)

\(CaCO_3+2HCl\rightarrow CaCl_2+CO_2+H_2O\)

\(NaHCO_3+HCl\rightarrow NaCl+H_2O+CO_2\)

28 tháng 2 2020

1.

\(2KClO_3\rightarrow2KCl+3O_2\)

\(4K+O_2\rightarrow2K_2O\)

\(K_2O+H_2O\rightarrow2KOH\)

\(2KOH+H_2SO_4\rightarrow K_2OSO_4+2H_2O\)

\(K_2SO_4+BaCl_2\rightarrow2KCl+BaSO_4\)

\(2KCl+2H_2O\rightarrow2KOH+Cl_2+H_2\)

2.

\(Cu+H_2SO_{4_{dac}}\rightarrow CuSO_4+SO_2+2H_2O\)

\(CuSO_4+BaCl_2\rightarrow CuCl_2+BaSO_4\)

\(CuCl_2+2AgNO_3\rightarrow Cu\left(NO_3\right)_2+2AgCl\)

\(Cu\left(NO_3\right)_2+2NaOH\rightarrow NaNO_3+Cu\left(OH\right)_2\)

\(Cu\left(OH\right)_2\rightarrow CuO+H_2O\)

\(CuO+H_2\rightarrow Cu+H_2O\)

3.

\(4Al+3O_2\rightarrow2Al_2O_3\)

\(Al_2O_2+6HCl\rightarrow2AlCl_3+3H_2O\)

\(AlCl_3+3NaOH\rightarrow Al\left(OH\right)_3+3NaCl\)

\(2Al\left(OH\right)_2\rightarrow Al_2O_3+H_2O\)

\(2Al_2O_3\rightarrow4Al+3O_2\)

\(2Al+2NaOH+2H_2O\rightarrow2NaAlO_2+3H_2\)

4.

\(C+O_2\rightarrow CO_2\)

\(CO_2+C\rightarrow2CO\)

\(2CO+O_2\rightarrow2CO_2\)

\(CO_2+NaOH\rightarrow NaHCO_2\)

\(NaHCO_3+NaOH\rightarrow Na_2CO_3+H_2O\)

\(Na_2CO_3+CaCl_2\rightarrow2NaCl+CaCO_3\)

\(CaCO_3\rightarrow CaO+CO_2\)

5.

\(Cl_2+H_2\rightarrow2HCl\)

\(4HCl+MnO_2\rightarrow MnCl_2+Cl_2+2H_2O\)

\(Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\)

\(2NaC+2H_2O\rightarrow2NaOH+Cl_2+H_2\)

\(Cl_2+2NaOH\rightarrow NaCl+NaClO+H_2O\)

28 tháng 2 2020

Viết PTHH biễu diễn chỗi biến hóa:
1) 2KClO3 -->2KCl+3O2

O2+4K-->2K2O

K2O+H2O-->2KOH

2KOH+H2SO4-->K2SO4+2H2O

K2SO4+BaCl2-->2KCl+BaSO4

2KCl-->Cl2+2K
2) Cu+FeSO4-->CuSO4+Fe

CuSO4+BaCl2-->CuCl2+BaSO4

CuCl2+2AgNO3-->Cu(NO3)2+2AgCl

Cu(NO3)+2NaOH-->Cu(OH)2+2NaNO3

Cu(OH)2-->CuO+H2O

2CuO-->2Cu+O2
3)4Al+3O2-->2Al2O3

Al2O3+6HCl-->2AlCl3+3H2O

2AlCl3+6NaOH-->2Al(OH)3+6NaCl

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

2Al2O3-->4Al+3O2

2Al+2H2O+2NaOH-->2NaAlO2+3H2
4)C+O2-->CO2

CO2+C-->2CO

2CO+O2---->2CO2-

CO2+NaOH----->NaHCO3

2NaHCO3-->Na2CO3+H2O+CO2

Na2CO3+CaCl2-->CaCO3+2NaCl

CaCO3-->CO2+CaO
5)Cl2+H2-->2HCL

2HCl-->Cl2+H2

Cl2+2Na-->2NaCl

2NaCl-->Cl2+2Na

Cl2+2NaOH-->NaClO+NaCl+H2O

21 tháng 9 2019

1) Cho các chất sau Ca(OH)2,Fe(OH)2,Cu(OH)2,NaOH. Chất nào tác dụng với :

a) Làm quỳ tím ẩm hóa xanh là Ca(OH)2 , NaOH

b) SOlà NaOH, Ca(OH)2

2NaOH +SO2--->Na2SO3 +H2O

Ca(OH)2 +SO2--->CaSO3 +H2O

c) HCl là Cu(OH)2 , Fe(OH)2 ,NaOH, Ca(OH)2

Cu(OH)2 +2HCl---->CuCl2 +2H2O

Fe(OH)2 +2HCl---->FeCl2 +2H2O

NaOH +HCl---->NaCl +H2O

Ca(OH)2 +2HCl---->CaCl2+2H2O

d) Phản ứng phân hủy

2Fe(OH)2 +O2---->Fe2O3 +3H2O

Chúc bạn học tốt

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↓

6 tháng 7 2021

Đáp án C

Ví dụ : $NaOH + HCl \to NaCl + H_2O$

6 tháng 7 2021

C.NaOH