a) 2Ca + O2 -to-> 2CaO

CaO + H2O --> Ca(OH)2

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

CaCO3 + CO2 + H2O --> Ca(HCO3)2

Ca(HCO3)2 -to-> CaCO3 + CO2 + H2O

CO2 + NaOH --> NaHCO3

2NaHCO3 -to-> Na2CO2 + CO2 + H2O

b) MgCO3 + H2SO4 --> MgSO4 + CO2 + H2O

MgSO4 + Na2CO3 --> MgCO3 + Na2SO4

MgCO3 + 2HCl --> MgCl2 + CO2 + H2O

a/ Ca + 1/2 O2 => CaO

CaO + H2O => Ca(OH)2

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

CaCO3 + CO2 + H2O => Ca(HCO3)2

Ca(HCO3)2 => CaCO3 + CO2 + H2O

CO2 + NaOH => NaHCO3

2NaHCO3 => Na2CO3 + CO2 + H2O

b/ MgCO3 + H2SO4 => MgSO4 + CO2 + H2O

MgSO4 + Na2CO3 => Na2SO4 + MgCO3

MgCO3 + 2HCl => MgCl2 + CO2 + H2O

(1) Ca + 2H₂O ----> Ca(OH)₂ + H₂

(2) Ca(OH)₂ --t^o--> CaO + H₂O

(3) CaO + CO₂ ----> CaCO₃

(4) CaCO₃ + CO₂ + H₂O ----> Ca(HCO₃)₂

(5) Ca(HCO₃) --t^o--> CaCO₃\(\downarrow\) + H₂O + CO₂

Trần Băng Băng:Phương trình thứ 2 có vấn đề

Chỉ có bazo ko tan mới nung tạo ra muối và nước thôi .

Giải:

a)

S + O2 -t⁰-> SO2↑

2SO2 + O2 -t⁰-> 2SO3↑

2SO3 + H2 -> H2SO4 + SO2↑

3H2SO4 + 2Al -> Al2(SO4)3 + 3H2↑

H2 + FeO -> Fe + H2O

3Fe + 2O2 -t⁰-> Fe3O4

b)

2Ba + O2 -> 2BaO

BaO + H2O -> Ba(OH)2

Ba(OH)2 + 2CO2 = Ba(HCO3)2

a)

\(\left(1\right)S+O_2\underrightarrow{t^o}SO_2\)

\(\left(2\right)SO_2+O_2\underrightarrow{t^o}SO_3\)

\(\left(3\right)SO_3+H_2O\rightarrow H_2SO_4\)

\(\left(4\right)2K+H_2SO_4\rightarrow K_2SO_4+H_2\uparrow\)

\(\left(5\right)FeO+H_2\rightarrow Fe+H_2O\)

\(\left(6\right)3Fe+2O_2\underrightarrow{t^o}Fe_3O_4\)

\(b.\)

\(\left(1\right)2Ba+O_2\underrightarrow{t^o}2BaO\)

\(\left(2\right)BaO+H_2O\rightarrow Ba\left(OH\right)_2\)

\(\left(3\right)Ba\left(OH\right)_2+CO_2\rightarrow Ba\left(HCO_3\right)_2\)

1. KClO3 --> O2 --> K2O --> KOH --> K2SO4 --> KCl --> Cl2

2KClO3---to---->2KCl+3O2

O2+4K-----> 2K2O

K2O+H2O---->2KOH

2KOH+H2SO4----->K2SO4+H2O

K2SO4+BaCl2-------> BaSO4 +2 KCl

2KCl---đpnc---> 2K +Cl2

2. Ca --> CaO --> Ca(OH)2 --> CaCO3 --> CaCl2 --> Ca(NO3)2 --> CaCO3

2Ca+O2---->2 CaO

CaO+H2O----->Ca(OH)2

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

CaCO3+2HCl-----> CaCl2+H2O+CO2

CaCl2+2AgNO3------> AgCl+Ca(NO3)2

Ca(NO3)2 +Na2CO3 -----> CaCO3 +2NaNO3

3. Ba --> Ba(OH)2 --> BaSO3 --> BaCl2 --> Ba(NO3)2 --> BaSO4

Ba+2H2O-----> Ba(OH)2+H2

Ba(OH)2+SO2------> BaSO3+H2O

BaSO3+2HCl-----> BaCl2+H2O+SO2

BaCl2+2AgNO3-----> Ba(NO3)2+2AgCl

Ba(NO3)2+H2SO4-------> BaSO4+2HNO3

Không xảy ra

Ca(HCO3)2 + 2HCl \(\rightarrow\) CaCl2 + 2CO2 + 2H2O

CaSO₄+2NaHCO₃-----> Ca(HCO₃)₂+Na₂SO₄

SO₂ thì có liên quan gì đến Ca(HCO₃)₂ đâu bạn Diana_Swag