Question

If a concentrated solution of potassium bromide is electrolysed, what gas will be produced at the cathode?

Answer 1

Molten lead bromide

Step-by-step explanation:

PbBr 2(l), is an electrolyte. During electrolysis: Pb 2+ ions gain electrons at the cathode and become Pb atoms. Br - ions lose electrons at the anode and become Br atoms, which pair up to form Br 2 molecules.