Question

Hoàn thành sơ đồ biến hoá sau

1. KClO_{3 -->} O₂ --> K₂O --> KOH --> K₂SO_{4 -->} KCl --> Cl₂

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

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

Answer 1

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