Electrolysis Flashcards
1
Q
Electrolysis
A
Breaking down of molten ionic compounds or in solution to produce new substances
2
Q
Why ONLY molten or dissolved ionic compound conduct electricity?
A
There are free ions, which can move
3
Q
What are positive ions called?
A
Cations
4
Q
What are negative ions called?
A
Anions
5
Q
To which electrode do cations attract during electrolysis?
A
Cathode
6
Q
To which electrode do anions attract during electrolysis?
A
Anode
7
Q
Is anode negative or positive?
A
Positive
8
Q
Is cathode negative or positive?
A
Negative
9
Q
Half equation which occurs at cathode for lead II bromide (PbBr2)
A
Pb2+ +2e- –> Pb
10
Q
Half equation which occurs at anode for lead II bromide (PbBr2)
A
2Br- –> Br2 + 2e-
11
Q
What are electrodes made out of?
A
Carbon
12
Q
What is unreactive material called?
A
Inert
