Lập các PTHH theo các sơ đồ phản ứng sau;

1. 2C + O₂ → 2CO

2. 4Na + O₂ → 2Na₂O

3. Mg + 2HCl → MgCl₂ + H₂

4. Fe₂O₃ + 3H₂ → 2Fe + 3H₂O

5. Na₂CO₃ + 2HCl → 2NaCl + H₂O + CO₂

2C+O2--->2CO

4Na+O2--->2Na2O

Mg+2HCl--->MgCl2+H2

Fe2O3+3H2--->2Fe+3H2O

Na2CO3+2HCl--->2NaCl+H2O+CO2

2C+O2--->2CO

4Na+O2--->2Na2O

Mg+2HCl--->MgCl2+H2

Fe2O3+3H2--->2Fe+3H2O

Na2CO3+2HCl--->2NaCl+H2O+CO2

Em đăng tách ra nhé! 2-3 lần

vui lòng viết tách ra

\(2K+Cl_2\rightarrow\left(t^o\right)2KCl\\ 3Fe+2O_2\rightarrow\left(t^o\right)Fe_3O_4\\ N_2+3H_2⇌\left(t^o,P,xúc.tác\right)2NH_3\\ Fe_2O_3+3H_2\rightarrow\left(t^o\right)2Fe+3H_2O\\ 2Mg+CO_2\rightarrow\left(t^o\right)2MgO+2C\\ 4P+5O_2\rightarrow\left(t^o\right)2P_2O_5\\ Ca\left(OH\right)_2+CO_2\rightarrow CaCO_3+H_2O\\ 2K+2H_2O\rightarrow2KOH+H_2\\ Fe+2HCl\rightarrow FeCl_2+H_2\\ 2Al+3H_2SO_4\rightarrow Al_2\left(SO_4\right)_3+3H_2\\ Fe+S\rightarrow\left(t^o\right)FeS\\ 2Al\left(OH\right)_3\rightarrow\left(t^o\right)Al_2O_3+3H_2O\\ 2HgO\rightarrow\left(450^o-500^oC\right)2Hg+O_2\\ CuCl_2+2KOH\rightarrow Cu\left(OH\right)_2+2KCl\)

a) \(4Fe+3O_{2\left(dư\right)}\xrightarrow[]{t^ocao}2Fe_2O_3\)

Tỉ lệ 4 : 3 : 2

b) \(K+H_2O\rightarrow KOH+\dfrac{1}{2}H_2\uparrow\)

Tỉ lệ 1 : 1 : 1 : \(\dfrac{1}{2}\)

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

Tỉ lệ 1 : 2 : 1 : 2

d) \(Fe+H_2SO_4\rightarrow FeSO_4+H_2\)

Tỉ lệ 1 : 1 : 1 : 1

e) \(Zn+Cl_2\xrightarrow[]{t^o}ZnCl_2\)

Tỉ lệ 1 : 1 : 1

g) \(2Fe\left(OH\right)_3\xrightarrow[]{t^o}Fe_2O_3+3H_2O\)

Tỉ lệ 2 : 1 : 3

Phản ứng hoá hợp:

a)\(2Mg+O_2\underrightarrow{t^0}2MgO\)

c)\(4Al+3O_2\underrightarrow{t^0}2Al_2O_3\)

m)\(H_2O+Na_2O\xrightarrow[]{}2NaOH\)

o)\(K_2O+H_2O\xrightarrow[]{}2KOH\)

Phản ứng thế:

e)\(Fe+2HCl\xrightarrow[]{}FeCl_2+H_2\)

g)\(2K+2H_2O\xrightarrow[]{}2KOH+H_2\)

h)\(HgO+H_2\underrightarrow{t^0}Hg+H_2O\)

n)\(Fe_3O_4+4H_2\underrightarrow{t^0}3Fe+4H_2O\)

Phản ứng trao đổi:

b)\(CaO+2HNO_3\xrightarrow[]{}Ca\left(NO_3\right)_2+H_2O\)

Phản ứng oxit-hoá khử

\(CH_4+2O_2\xrightarrow[]{}CO_2+2H_2O\)

a) \(4P+5O_2\rightarrow\left(t_o\right)2P_2O_5\)

b) \(3Fe+2O_2\rightarrow\left(t_o\right)Fe_3O_4\)

c) \(Zn+2HCl\rightarrow ZnCl_2+H_2\)

d) \(2Na+2H_2O\rightarrow2NaOH+H_2\)

e) \(P_2O_5+3H_2O\rightarrow2H_3PO_4\)

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

 Chúc bạn học tốt

a) hoàn thành các PTHH sau:

1) 2HgO→ 2Hg + O2 (phân huỷ 0

2) 4P+ 5O2→ 2P2O5 (hoá hợp)

3) Fe2O3 + 3H2→3H2O + 2Fe (oxi hoá - khử)

4) Ba + 2HCl→ BaCl2+ H2 (oxi hoá khử)

\(a,\left(1\right)Fe_2O_3+3H_2\rightarrow2Fe+3H_2O\left(1:3:2:3\right)\)

\(\left(2\right)Mg+2HCl\rightarrow MgCl_2+H_2\left(1:2:1:1\right)\\ \left(3\right)2FeCl_3+3Ca\left(OH\right)_2\rightarrow2Fe\left(OH\right)_3+3CaCl_2\left(2:3:2:3\right)\)

\(\left(4\right)K_2CO_3+2HCl\rightarrow2KCl+H_2O+CO_2\left(1:2:2:1:1\right)\)

\(b,PTHH:2Cu+O_2\underrightarrow{t^o}2CuO\\ Áp.dụng.ĐLBTKL,ta.có:\\ m_{Cu}+m_{O_2}=m_{CuO}\\ m_{O_2}=m_{CuO}-m_{Cu}=32-25,6=6,4\left(g\right)\)

K₂O + H₂O => 2KOH 

2Na + Cl₂ -t⁰-> 2NaCl 

Mg + 2HCl => MgCl₂ + H₂ 

a) 2Al + 3Cl2 ---> 2AlCl3
b) Fe2O3 + 3H2 ---> 2Fe + 3H2O
c) 4P + 5O2 ---. 2P2O5
d) 2Al(OH)3 ---> Al2O3 + 3H2O
e) (NH4)2CO3 + 2NaOH ---> 2Na2CO3 + NH3 + 2H2O
f) Fe + HCl ---> FeCl2 + O2 (đề sai)
g) 2KClO3 ----> 2KCl + 3O2
h) 3NaOH + FeCl3 ----> Fe(OH)3 + 3NaCl
i) ZnO + 2HCl ----> ZnCl2 + H2O
k) 2K + 2H2O ----> 2KOH + H2
m) 2Na + 2H2O ----> 2NaOH + H2
n) BaCl2 + H2SO4 -----> BaSO4 + 2HCl
o) Na2O + H2O ---> 2NaOH

a) 2Al + 3Cl₂ → 2AlCl₃

b) 2Fe₂O₃ + 6H₂ → 4Fe + 6H₂O

c)4P +5O₂ → 2P₂O₅

d) 2Al(OH)₃ → Al₂O₃ + 3H₂O

e) \(\left(NH_4\right)_2CO_3+2NaOH\rightarrow Na_2CO_3+2NH_3+2H_2O\)

f) Fe + 2HCl → FeCl₂ + H₂

g) 2KClO₃ → 2KCl + 3O₂

h) 3NaOH + FeCl₃ → Fe(OH)₃ + 3NaCl

i) ZnO + 2HCl → ZnCl₂ + H₂O

k) 2K + 2H₂O → 2KOH + H₂

m) 2Na + 2H₂O → 2NaOH + H₂

n) BaCl₂ + H₂SO₄ → BaSO₄ + 2HCl

o) Na₂O + H₂O → 2NaOH

2Al+3Cl2--->2AlCl3

Fe2O3+3H2--->2Fe+3H2O

4P+5O2--->2P2O5

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

(NH4)2CO3+2NaOH--->Na2CO3+2NH3+2H2O

Fe+2HCl--->FeCl2+H2

2KClO3--->2KCl+3O2

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

ZnO++2HCl-->ZnCl2+H2O

2K+2H2O--->2KOH+H2

2Na+2H2O--->2NaOH+H2

BaCl2+H2SO4--->BaSO4+2HCl

Na2O+H2O--->2NaOH