Electrolysis of Molten Compounds Flashcards

All 4 cards in this deck

What are the products of the electrolysis of molten lead bromide?

Lead at the cathode and bromine at the anode.

What two changes must be made to normal electrolysis apparatus to electrolyse molten lead bromide?

Use a crucible (not a beaker) that will not break or melt when heated strongly, and heat it with a Bunsen burner to melt the lead bromide.

What are the products of electrolysing a molten binary ionic compound?

e.g. molten zinc chloride

The metal forms at the cathode and the non-metal at the anode — zinc at the cathode, chlorine at the anode.

When molten lead bromide is electrolysed, what do the bromine and the lead look like?

Bromine: a red-brown gas given off at the anode. Lead: a silvery liquid that collects at the cathode.