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14 Cards in this Set
- Front
- Back
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What is a redox reaction ? |
A redox reaction is a reaction that involves both oxidation and reduction |
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What is oxidation ? |
Oxidation is the loss of electrons |
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What is reduction ? |
Reduction is the gain of electrons |
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What is an oxidising agent ? |
An oxidisng agent is a species that oxidises another species. It therefore gains electrons. So it is reduced |
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What is a reducing agent ? |
A reducing agent is a species that reduces another species. It therefore loses electrons. So it is oxidised |
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What are oxidation numbers ? |
Oxidation numbers are the charge that an ion or has or the charge it would have if the species were fully ionic |
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What is the oxidation number of fluorine ? |
-1 |
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What is the oxidation number of hydrogen and what exceptions are there ? |
+1 except when it is with less electromagnetic elements (it is then -1) |
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What is the oxidation number of oxygen and what are the exceptions ? |
-2 except when in peroxide (-1) and with fluorine (+ve) |
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What is happening if an elements oxidation number increases ? |
It is being oxidised |
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What is happening if an elements oxidation number decreases? |
It is being reduced |
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What is disproportionation ? |
Disproportionation is the simultaneous oxidation and reduction of an element in a single reaction |
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How do you balance a full equation when combining 2 ionic half equations? |
You can multiple one or both of the equations so that there is an even number of electrons on the left and right side of the equation |
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If there are h+ ions on both sides of a full equation what do u do ? |
Cancel until they only exist on one side |
