Redox Reactions

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What is oxidation?
Where an atom looses electrons in a reaction
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What is reduction?
Where an atom gains electrons in a reaction
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What is an oxidising agent?
An atom which is gains electrons so that another atom can become oxidised
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What is a reducing agent?
An atom which looses electrons so that another atom can be reduced
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What is the oxidation number for an uncombined element?
0
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What is the oxidation number for combined oxygen?
-2
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What is the oxidation number for combined oxygen in peroxide?
-1
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What is the oxidation number for combined hydrogen?
+1
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What is the oxidation number for hydrogen in metal hydrides (group 1)?
-1
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What is the oxidation number for a simple ion?
Charge on the ion
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What is the oxidation number for combined fluorine?
-1
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How can we identify which atoms have been oxidised or reduced in a full equation?
Look at the changes in charges
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Where are electrons written in oxidation half equations?
A product of the reaction
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Where are electrons written in reduction half equations?
A reactant of reaction
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How do we balance reduction half equations?
Use H+ ions
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Other cards in this set

Card 2

Front

What is reduction?

Back

Where an atom gains electrons in a reaction

Card 3

Front

What is an oxidising agent?

Back

Preview of the front of card 3

Card 4

Front

What is a reducing agent?

Back

Preview of the front of card 4

Card 5

Front

What is the oxidation number for an uncombined element?

Back

Preview of the front of card 5
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