4)

KClO3+3MnO2+6NaOH→3H2O+KCl+3Na2MnO4

KCl+AgNO3-->AgCl+KNO3

2AgCl-->2Ag+Cl2 (Nhiệt độ phòng , có ánh sáng)

3Cl2+6KOH-->H2O+5KCl+KClO3 (Nhiệt độ)

5)

CaOCl2+MnSO4+2NaOH→H2O+MnO2+Na2SO4+CaCl2

2CaOCl2+H2O+CO2→CaCO3+CaCl2+2HClO

CaCO3-->CaO+CO2 (Nhiệt độ)

H2O+NaClO+CO2-->NaHCO3+HClO

6)

MnO2+4HBr→Br2+2H2O+MnBr2

Br2+2HI→I2+2HBr

2Ag+I2→2AgI

4)

3 MnO2 + KClO3 + 6 NaOH --> 3 Na2MnO4 + KCl + 3 H2O

KCl + AgNO3 --> AgCl + KNO3

2 AgCl --> 2 Ag + Cl2

3 Cl2 + 6 KOH --> 5 KCl + KClO3 + H2O

5)

CaOCl2 + MnSO4 + 2 NaOH --> MnO2 + Na2SO4 + CaCl2 + H2O

2 CaOCl2 + H2O + CO2 --> CaCO3 + CaCl2 + 2 HClO

CaCO3 --> CaO + CO2

NaClO + CO2 + H2O --> NaHCO3 + HClO

6)

MnO2 + 4 HBr --> Br2 + 2 H2O + MnBr2

Br2 + 2 HI --> I2 + 2 HBr

2 Ag + I2 --> 2 AgI