ELECTROLYSIS OF COPPER SULPHATE Flashcards
1
Q
What is the chemical formula of the copper (II) sulphate used in the electrolysis?
A
CuSO4 (aq)
2
Q
What is the anode in the electrolysis of copper sulphate made of?
A
Impure copper
3
Q
What is the cathode in the electrolysis of copper sulphate made of?
A
Pure copper
4
Q
What is substance that will build up at the cathode?
A
Copper
5
Q
What is the half reaction at the cathode?
A
Cu2+ + 2e- –> Cu(s)
6
Q
What forms at the anode?
A
Anode sludge
7
Q
How do you get the impure copper that is used for the anode?
A
Reduction of copper ore using carbon
8
Q
What do we use copper for?
A
Making conductive wires
Coins
9
Q
What happens to the size of the anode and cathode as electrolysis happens?
A
The cathode gets bigger
The anode gets smaller
10
Q
Are the copper ions reduced or oxidised at the cathode?
A
Reduced
