How can we know beforehand that free chlorine will form in MnO2+4HCl -> MnCl2 +Cl2+2H2O?
MnO2+4HCl -> MnCl2 +Cl2+2H2O
How can we know beforehand that some of the chlorine will break free? Can the reaction happen this way:
MnO2+4HCl ->MnCl4 +2H2O
After all, other oxides react with HCl without a redox reaction, so no free Cl is formed:
CaO + 2HCl = CaCl2 + H2O
MnO2+4HCl -> MnCl2 +Cl2+2H2O
How can we know beforehand that some of the chlorine will break free? Can the reaction happen this way:
MnO2+4HCl ->MnCl4 +2H2O
After all, other oxides react with HCl without a redox reaction, so no free Cl is formed:
CaO + 2HCl = CaCl2 + H2O
1 Answer
Feb 12, 2016
In MnO2, Mn is in +4 oxidation state, It has also a lower stable oxidation state +2.but Ca has got only one oxidation state +2.
SO MnO2 acts as oxidizing agent but CaO does not.
Explanation:
Here chloride ion gets oxidized by Mn(+4) in MnO2 to chlorine. MnCl4 cannot be produced since Mn+4 will take up electron from Cl ion.
