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10 Cards in this Set
- Front
- Back
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Meaning of electrolysis |
Means splitting up with the electricity and in this case décomposition of ionic compounds using electricity |
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Ionic compounds has to be in what state |
Molten, so it will be electrolyte as ions will be free to move |
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Electrolyte |
Liquid that conducts electricity |
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Steps |
Ions from electrolyte move towards the electrodes, where they react and the compound decomposes Positive ions move toward the negative electrode and vice versa |
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Negative Electrode |
Cathode and positive ions move towards it Réduction takes place Gains électrons |
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Positive Electrode |
Anode, oxidation takes place, loses electrons |
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What is the common example for electrolysis |
Aluminium extraction from bauxite / aluminium Oxide |
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What is added to lower the melting point of bauxite |
Cryolite |
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What is released at the Cathode |
If Halide ions then halogen is discharged Otherwise OH- ions are discharged |
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What is released at Anode |
If metal is less reactive than hydrogen then it is released If metal is more reactive than hydrogen then H+ ions are released |
