Quiz 8
The equations on the two versions were the same, just reversed. The following are the solutions for version 2.
- a)Fe2+ + MnO2 => MnO4- + Fe(s) (acidic)
Fe2+ + 2e- => Fe(s) (x3)
2H2O + MnO2 => MnO4- + 4H+ + 3e- (x2)
3Fe2+ + 4H2O +2MnO2 => 3Fe(s) + 2MnO4- + 8H+
-
b) Th(s) + ClO2- => Th4+ + ClO-(basic)
Th(s) => Th4+ + 4e-(x1)
2e- + H2O + ClO2- => ClO- + 2OH-(x2)
Th(s) + 2H2O + 2ClO2-=> Th4+ + 2ClO- + 4OH-