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16 Cards in this Set
- Front
- Back
- 3rd side (hint)
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What is electrolysis |
Breaking down of a substance using electricity electrical current is passed through electrolytes |
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What happens at the cathode |
Positive irons in the electrolyte move towards it and are reduced (gain electrons) |
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What happens at the anode |
Negative irons move towards it and are oxidised (lose electrons) |
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How to set up an electrochemical cell if the electrolyte solution |
Get to inert electrodes clean surfaces of electrodes don’t touch the electrodes with your hands place both electrons into the beaker filled with electrolyte connect the electrodes to a power supply using crocodile clips and wires when you turn the power on the current will flow through the cell |
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How to set up an electrochemical cell if the electrolyte is the molten ionic substance |
Put the solid ionic substance in the Crucible heat with Bunsen burner until it’s molten dip to clean inert electrodes into electrolyte |
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Electrolysis of copper sulphate practical |
What does electrolysis of copper sulphate with inert electrodes produce |
Oxygen |
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Electrolysis of copper sulphate practical |
What does electrolysis of copper sulphate with inert electrodes produce |
Oxygen |
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Electrolysis of copper sulphate what is produced at the cathode |
Copper metal because copper is less reactive than hydrogen |
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Electrolysis of copper sulphate practical |
What does electrolysis of copper sulphate with inert electrodes produce |
Oxygen |
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Electrolysis of copper sulphate what is produced at the cathode |
Copper metal because copper is less reactive than hydrogen |
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In copper sulphate electrolysis what is produced at the anode |
As there are no halide ions present oxygen water produced at Anode |
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What happens if you use copper electrodes in a solution of copper sulphate |
The mass of the anode will decrease and the mass of the cathode will increase because copper is transferred from the anode to the cathode |
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What happens during electrolysis of the molten ionic solid |
Positive metal ion is reduced to metal ions at the cathode negative ions are oxidised to atoms or molecules at the anode |
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If an ion is + what happens to it in electrolysis |
It will go to the cathode E.g. K+ + e- = K |
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In Electrolysis of aqueous solutions what happens at the cathode |
If the metal is more reactive than hydrogen then hydrogen gas will be produced if the metal is less reactive than the hydrogen then a solid layer of pure metal will be produced instead |
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And electrolysis of aqueous solutions what will happen at the anode |
If hydroxide and halide ions are present molecules of chloride bromine or iodine will be formed if no halide ions are present then oxygen will be formed |
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