Question

When aqueous lithium bromide is electrolysed a colourless gas is formed at negative electrode and the solution becomes alkaline

explain these observations and include an equation in your explanation

Answer 1

Answer:

Molten lead bromide, 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.