Question

In galvanic element Cr | Cr3+ ; Fe2+ | Fe in which direction will move the electrons?

Answer 1

Electrons will move from `Cr`, the anode, to `Fe`, the cathode.

Explanation:

The electrodes for this question would be `Cr` and `Fe`.

Here's a table of standard reduction potentials:

We can see that `Eº` is greater for `Fe^(2+)` than for `Cr^(3+)`—this means that `Fe^(2+)` is more likely be reduced, or to gain electrons, than `Cr^(3+)`.

So, in a galvanic cell with `Fe` and `Cr`, `Fe` will be the cathode (which gains electrons) and `Cr` will be the anode (which loses electrons).

Therefore, electrons will flow from `Cr`, the anode, to `Fe`, the cathode.