Redox reactions

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What is oxidation
Oxidation is the loss of electrons
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what is reduction
Reduction is the gaining of electrons
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what is the rule for oxidation number with uncombined elements
the oxidation number is always 0
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what is the rule for oxidation number with elements in a compound
The oxidation number should add up to 0
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what is the rule for oxidation number when there is an ion
when there is an ion the oxidation numbers should add up to that ion
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what is the oxidation number of group 1 elements
+1
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what is the oxidation number of group 2 elements
+2
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What is the oxidation state of group 7 elements
-1
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What is the oxidation number of oxygen
-2
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Br2 (aq) + 2I-(aq)  I 2 (aq) + 2 Br-(aq) in the equation which element is being reduced and which oxidised
iodine is being oxidised bromine is reduced
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what is an oxidising agent
An oxidising agent is an element which causes another element to be oxidised whilst itself it is being reduced it is an electron acceptor
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what is a reducing agent
A reducing agent causes another element to be reduced whilst itself is being oxidised
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how do you write half equations
Find oxidation numbers of each element. See which is reduced which is oxidised. Then add electrons to balance out the oxidation numbers if its a reduction es go to the reactants and if oxidised the es go to the products
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Other cards in this set

Card 2

Front

what is reduction

Back

Reduction is the gaining of electrons

Card 3

Front

what is the rule for oxidation number with uncombined elements

Back

Preview of the front of card 3

Card 4

Front

what is the rule for oxidation number with elements in a compound

Back

Preview of the front of card 4

Card 5

Front

what is the rule for oxidation number when there is an ion

Back

Preview of the front of card 5
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