Electrolysis: Electrolysis is the process of using electricity to break down or decompose an ionic compound. The compound is usually dissolved in water or heated until molten.
Electrolyte: A liquid which conducts electricity.
Electrolysis of Molten Compounds, e.g. Lead (II) Bromide:
The electrolysis of Lead (II) Bromide
The electrolysis of aqueous solutions
You might be asked how you would provide evidence for what element is deposited at the anode or cathode.
- If the gas produced at the cathode burns with a ‘pop’ when a sample is lit with a lighted splint then the gas is hydrogen.
- If the gas produced at the anode relights a glowing splint dipped into a sample of the gas then the gas is oxygen.