Problem: When an aqueous solution of FeF2 is electrolyzed, what forms at the electrodes?a. Cathode: Fe; anode: Cl2b. Cathode: Fe; anode: O2 c. Cathode: H2; anode: Cl2 d. Cathode: H2; anode: O2 e. Cathode: Fe; anode: H2 

FREE Expert Solution

We’re being asked to determine the species forme at the electrodes when an aqueous solution of FeF2 is electrolyzed


Recall that the cathode is where reduction occurs while the anode is where oxidation occurs.


Since FeF2 is an ionic compound, it forms ions when dissociating in water

The dissociation of FeF2 in water is as follows:

The fluoride ion, F, has a charge of –1. Iron then has a charge of +2:

FeFr2(s)  Fe2+(aq) + 2 F(aq)


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Problem Details

When an aqueous solution of FeF2 is electrolyzed, what forms at the electrodes?

a. Cathode: Fe; anode: Cl2
b. Cathode: Fe; anode: O2 
c. Cathode: H2; anode: Cl2 
d. Cathode: H2; anode: O2 
e. Cathode: Fe; anode: H2 

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Electrolysis of Water & Mixture of Ions concept. If you need more Electrolysis of Water & Mixture of Ions practice, you can also practice Electrolysis of Water & Mixture of Ions practice problems.

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