Question

Hoàn thành chuỗi biến hóa sau :

KMnO₄ \(\rightarrow\) A \(\rightarrow\) B \(\rightarrow\) C \(\rightarrow\) D \(\rightarrow\) CO₂

Answer 1

KMnO4--->O2--->SO2--->SO3--->H2SO4--->CO2

pt:

2KMnO4--->K2MnO4+MnO2+O2

S+O2--->SO2

2SO2+O2---t*/V2O5-->2SO3

SO3+H2O--->H2SO4

H2SO4+Na2CO3--->Na2SO4+CO2+H2O

Answer 2

KMnO₄ → O₂ → CaO → CaCl₂ → CaCO₃ → CO₂

2KMnO₄ ---t^o---> K₂MnO₄ + MnO₂ + O₂

2Ca + O₂ → 2CaO

CaO + 2HCl → CaCl₂ + H₂O

CaCl₂ + Na₂CO₃ → CaCO₃ + 2NaCl

CaCO₃ ---t^o---> CaO + CO₂

Answer 3

KMnO4 → O2 → CaO → CaCl2 → CaCO3 → CO2

2KMnO4 ---to---> K2MnO4 + MnO2 + O2

2Ca + O2 → 2CaO

CaO + 2HCl → CaCl2 + H2O

CaCl2 + Na2CO3 → CaCO3 + 2NaCl

CaCO3 ---to---> CaO + CO2