Question

Identify those elements that can be prepared by electrolysis of their aqueous salts: copper, barium, aluminum, bromine.

Short answer

Elements that can be prepared by electrolysis of their aqueous salt: Bromine and copper.

Step-by-step solution

Definition of Electrolysis

The process of dissolving ionic compounds into their constituent components by delivering a direct electric current through the complex in a fluid form is known as electrolysis. At the cathode, cations are reduced, whereas anions are oxidized.

Determining the elements that prepared by electrolysis

Not all ions in aqueous solutions, including these, may be transformed to their free element form via electrolysis due to overvoltage:

• Metal cations from Group 1A.
• Metal cations from Group 2A and Aluminum cations from Group 3A.
• While the fluoride ion cannot be oxidized, the other halides can.

Only copper and bromine can be oxidized out of the list of copper, barium, aluminum, and bromine. Aluminum is a non-reducible group 3A metal, whereas barium is a group 2A metal.