C8 Electrolysis Flashcards
Electrolysis ?
The process of using electricity 💡 to extract elements from a compound
What is the name of the positive electrode?
Anode
What is the name of the negative cathode?
Cathode
Electrolyte?
A liquid or solution that contains ions and so can conduct electricity 💡
Where r metals formed?
Cathode
Where r non-metals formed?
Anode
How can ionic substances be electrolysed?
By melting or dissolving them, and then passing a direct current through them
Y can solid ionic substances not be electrolysed?
They do not conduct electricity 💡 or the ions cannot move
In the electrolysis of a metal halide solution, what is produced at the anode?
Halogen gas 😤 🔋
In the electrolysis of solutions, when is the metal not produced at the cathode?
When the metal is more reactive than hydrogen
In the electrolysis of a metal sulfate solution, what is produced at the anode?
Oxygen 🐂
What is the half-equation for the ionisation of water 🌊?
H2O(l)➡️H+(aq)+OH-(aq)
What metals r extracted from ionic compounds by using electrolysis?
Metals that r more reactive than carbon
In the electrolysis of aluminium oxide, y is the aluminium oxide mixed with cryolite?
To lower the melting point
In the electrolysis of aluminium oxide, what r the anodes made of?
Graphite
