electrolysis revision test Flashcards
1
Q
How to make a copper plated item
A
anode: copper
Electrode: aqueous copper (II) sulphate
2
Q
why a mixture Is used at the electrode instead of using only aluminium oxide
A
Lower melting point
Therefore costs less
3
Q
what happens at the negative electrode during the production of aluminium
A
Aluminium ions gain electrons
4
Q
why must the positive electrode be continually replaced
A
The positive electrode is made out of carbon
carbon burns and forms carbon dioxide
5
Q
What is the only metals that you can get from solutions
A
stuff below hydrogen on the reactivity series
6
Q
What is attracted to the positive electrode
A
anions
7
Q
What is attracted to the negative electrode
A
Cations
