Which process is an oxidation?

2 H+(aq) + CO32-(aq) H2O(l) + CO2(g)

Fe3+(aq) Fe2+(aq)

2 CrO42-(aq) + 2 H+(aq) Cr2O72-(aq) + H2O(l)

Ba2+(aq) + CrO42-(aq) BaCrO4(s)

MnO2(s) MnO4-(aq)

Question

Which process is an oxidation?

2 H+(aq) + CO32-(aq)   H2O(l) + CO2(g)

Fe3+(aq)   Fe2+(aq)

2 CrO42-(aq) + 2 H+(aq)   Cr2O72-(aq) + H2O(l)

Ba2+(aq) + CrO42-(aq)   BaCrO4(s)

MnO2(s)   MnO4-(aq)

anonymous · Answer

oxidation = redox.
so I'd say: Fe3+ (aq) ----> Fe2+(aq)

anonymous · Answer

correct

mattfeury · Answer

Loco, if you wouldn't mind posting these types of questions in the appropriate group (there is a Chemistry group on the home page). 

I know they aren't quite as busy as this group, but they'll never get there if there are no good questions :). You can always try to get some friends on chat to come over and help you.

anonymous · Answer

No wait, it's E. B is reduction, E is oxidation...

anonymous · Answer

yeah it's E