Electrolysis Flashcards
1
Q
What elements need to be extracted by electrolysis?
A
The one above carbon in the reactivity series
2
Q
What is electrolysis used for?
A
To extract metals out of compounds
3
Q
What are the anode and cathode made out of? And why?
A
There both made out of graphite, because graphite has a high boiling point, is not reactive.
4
Q
Which ions go to the cathode and which to anode?
A
Positive go to the cathode
Negative go to the Anode
5
Q
Why should the anode be replaced regularly?
A
Because the oxygen at the anode reacts with graphite (carbon) to form CO2
6
Q
Why is electrolysis expensive ?
A
A lot of energy is required for the electrical current
