During the
electrolysis of molten lead(II) bromide, PbBr2, bromine gas, Br2
is released at the cathode while the lead metal is formed at the anode.
Pb2+
and Br- ions are present in the molten lead(II) bromide, PbBr2. At the anode, bromide ions, Br-
are discharged by donating electrons to form bromine molecules, Br2.
At the cathode, each lead(II) ion, Pb2+ is discharged by accepting
two electrons to form a lead atom.