More Electrolysis Flashcards
What is the charge of a metal ion?
Always positive
Why can’t ionic solids conduct electricity?
The ions are locked in place
What must be done to an ionic substance so it conducts electricity?
It must dissolve or be melted
What is an electrolyte?
The solution being broken down in electrolysis
Contains ions
What is electroplating?
When the cathode is lined by the positive metal ions
What is aluminium used for? Why?
Aeroplanes and cans
It is very light
What is cryolite?
A compound that reduces aluminium’s melting point
What are the issues with the electrolysis of aluminium oxide?
Produces CO2
Anode must frequently be replaced as a result
What is reduction?
Gain of electron(s)
What is oxidisation?
Loss of electron(s)
What are the pros and cons of electrolysis?
Pure product
Expensive - takes a lot of energy
