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- 1. Multiple Choice
The positive copper ions are attracted to the
Positive Anode
Negative Anode
Positive Cathode
Negative Cathode
- 2. Multiple Choice
Copper will form at which electrode
Positive
Negative
Neutral
Neither
- 3. Multiple Choice
Electrolysis will NOT work when the compound is in a solid state because.....
The ions are free to move
The ions are not free to move
The ions are arranged in rows
The ions are not present
- 4. Multiple Choice
In the practical, the electrodes were made out of
Copper
Metal
Carbon
Steal
- 5. Multiple Choice
When Copper Sulphate undergoes electrolysis using inert electrodes the products are
Copper at cathode, oxygen at anode
Hydrogen at cathode, oxygen at anode
Oxygen at cathode, hydrogen at anode
Hydrogen at cathode, copper at anode
- 6. Multiple Choice
Hydroxyl ions will be attracted to the anode and
4OH- -4e -> 2H2O + O2
2OH- -2e -> H2O + O
- 7. Multiple Choice
As the electrolysis of Copper Sulphate occurs the blue colour of the solution...
Darkens
Becomes green
Turns white
Becomes lighter
- 8. Multiple Choice
The electrolyte must be in a liquid state
So the ions cant move
So the ions are not moving
So the ions are free to move
So the ions vibrate
- 9. Multiple Choice
What are active electrodes ?
they do not take part in electrolysis
they take part in the electrolysis
the anode is inert
the ions in the electrolyte are different to the anode
- 10. Multiple Choice
Why does Cu deposit on the cathode?
it is above H in the electrochemical series
it is a very active metal
it is below H in the electrochemical series
- 11. Multiple Choice
As electrolysis of CuSO4 with inert electrodes continues ,the electrolyte becomes
neutral
acidic
basic
- 12. Multiple Choice
Electrolysis of CuSO4 using copper electrodes
colour fades
colour stays the same
- 13. Multiple Choice
What happens to the copper anode if CuSO4 electrolysed
copper anode becomes smaller
nothing
copper anode gets bigger
- 14. Multiple Choice
Anode reaction
Cu2+(aq) + SO4- (aq) -> CuSO4 (aq)
Cu2+ (aq) - 2e -> Cu(s)
Cu (s) -2e -> Cu2+(aq)
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