AS Chemistry - Redox

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The oxidation number of atoms in all elements is ..
always 0
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The oxidation number of a simple ion is always..
equal to the charge on the ion
2 of 11
The sum of all oxidation numbers for each atom (or ion) within a compound must equal..
zero
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The sum of all oxidation states for each atom within a molecular ion must equal..
the overall charge of the ion
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The oxidation states of bonded group I and group II metals are usually..
+1 and +2 respectively
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The oxidation state of Hydrogen is usually..
+1 except for metal hydrides
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The oxidation state of oxygen is usually..
-2 except from peroxides where it is -1
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What does a roman numeral correspond to?
The positive oxidation number
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What would happen to the oxidation number if an atom lost electrons?
Oxidation number will increase
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What would happen to the oxidation number if an atom gained electrons?
Oxidation number will increase
10 of 11
What is disproportionatation?
a special type of redox reaction in which the same atom is both oxidised and reduced.
11 of 11

Other cards in this set

Card 2

Front

The oxidation number of a simple ion is always..

Back

equal to the charge on the ion

Card 3

Front

The sum of all oxidation numbers for each atom (or ion) within a compound must equal..

Back

Preview of the front of card 3

Card 4

Front

The sum of all oxidation states for each atom within a molecular ion must equal..

Back

Preview of the front of card 4

Card 5

Front

The oxidation states of bonded group I and group II metals are usually..

Back

Preview of the front of card 5
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