[lalex0710]

I am struggling with the answers my teacher gave me, which contradicted what I have gotten as my results, and I need some clarification or assistance from you guys.

So the question is:

Is Fe2+(aq) capable of reducing Cr3+(aq) to Cr2+(aq)?

I got an answer of yes, since Cr3+ is the oxidizing agent and it is above Fe2+ in the reduction table which indicates it has a higher reduction potential, thus should be able to oxidize Fe2+ or Fe2+ should be capable of reducing Cr3+ since it is lower in reduction potential.

But the answer the teacher gave was no, but I couldn't understand how she arrived at the answer, but I know it has something to do with Fe being multivalent, so it could be referring to Fe3+, but the question asks Fe2+, so Im not sure how she got the answer. Thanks for the help.

Also another similiar question is this: Is Fe2+(aq) capable of reducing Sn2+(aq) to Sn(s)?

[Hunter2]

I would check the redox potentials.

Chromium-II is very unstable and will be oxidized by oxygen of the air.

[Borek]

Cr3+ is the oxidizing agent and it is above Fe2+ in the reduction table

Please list exact standard potentials for both reactions.