Question

Calculate the standard emf for the following reaction:
2ClO3- (aq)+10Br-(aq)+12H+(aq) --> Cl2(g)+5Br2(l)+6H2O(l)

Answer 1

you have to separate it into the 2 individual half-reactions and look their individual reduction potential on a table.

Then find the electromotive force: \(E^o=\underbrace{E_{red}}_{reduction~1/2 ~rxn}-\underbrace{E_{red}}_{oxidation~1/2~rxn}\)