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13 Cards in this Set
- Front
- Back
Oxidising power of a halogen |
The oxidising power of a halogen is a measure of the strength with which a halogen atom is able to attract and capture an electron to form a halide ion |
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Half equations of a halogen |
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Trends in reactivity of Group 7 |
Reactivity DECREASES DOWN the group: More shells, atomic radius increases Greater shielding effect Weaker nuclear attraction Less able to attract and capture another electron Fluorine is most reactive |
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Displacement reactions |
A displacement reaction is a reaction in which a more reactive element displaces a less-reactive element from an aqueous solution of its halide ions |
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Colours of displacement reactions for halogens |
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For each displacement reaction you must write : |
Overall redox reaction Ionic equation Observations |
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Displacement reactions |
A more reactive halogen will displace a less reactive halogen. |
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Disproportionation reaction definition |
A disproportionation reaction is a reaction in which the same element is both oxidised and reduced |
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Disproportionation of chlorine in water |
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Disproportionation of chlorine in aqueous sodium hydroxide |
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Test for a halogen - chlorine |
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Halogen test - bromine |
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Halogen test - iodine ions |
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