The cathode reaction is: PLEASE ANSWER TO OR FROM for these!!! In the external c

Question

The cathode reaction is:

PLEASE ANSWER TO OR FROM for these!!!
In the external circuit, electrons migrate _____(fromto) the Hg|Hg2+ electrode _____(fromto) the Fe2+|Fe3+ electrode.

In the salt bridge, anions migrate _____(fromto) the Fe2+|Fe3+ compartment _____(fromto) the Hg|Hg2+ compartment.

The cathode reaction is:

PLEASE ANSWER TO OR FROM for these!!!

In the external circuit, electrons migrate _____(fromto) the Al|Al3+ electrode _____(fromto) the Fe2+|Fe3+ electrode.

In the salt bridge, anions migrate _____(fromto) the Fe2+|Fe3+ compartment _____(fromto) the Al|Al3+ compartment.

Explanation / Answer

For 1st reaction:

Loss of electrons take place at Fe electrode and gain of e- at Hg electrode.

a) Electrons migrate to Hg electrode from Fe2+

b) Electrons migrate from Iron compartment to Hg compartment

2nd reaction

Gain of electron at Fe electrode and loss of electron at Al electrode

a) Electrons migrate from Al electrode, to Fe electrode

b) Electrons migrate to Al compartment, from Fe compartment

Electron flow in compartments are opposite to flow of electron at electrodes

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