Question

Balancing Redox Reactions. Balance the acidic solution of MnO2+ Cl- = Mn+2 + Cl2 using half reaction?

Just making sure that my answer is right because my teacher(disorganized) doesn't have an answer key.

Answer 1

Disorganized professors for chemistry aren't fun!

Consider,

`MnO_2 + Cl^(-) to Mn^(2+) +Cl_2` composed of,

`MnO_2 to Mn^(2+)`, and

`Cl^(-) to Cl_2`

In turn,

`"Reduction: "` `2e^(-) + 4H^(+)+ MnO_2 to Mn^(2+) + 2H_2O`, and

`"Oxidation:"` `2Cl^(-) to Cl_2 + 2e^(-)`

sum to give us,

`4H^(+) + MnO_2 + 2Cl^(-) to Cl_2 + Mn^(2+)+2H_2O`