Define oxidation in terms of electrons.

Oxidation is the loss of electrons.


Oxidation can also be defined as the gain of oxygen.

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Define reduction in terms of electrons.

Reduction is the gain of electrons.


Reduction can also be defined as the loss of oxygen.

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What is a redox reaction?

A redox reaction is a reaction in which oxidation and reduction take place at the same time


This results in a transfer of electrons from one species to another.

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What is a spectator ion?

A spectator ion is an ion whose oxidation number does not change throughout the reaction.

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What are reducing agents?

Reducing agents are electron donors; they get oxidised in redox reactions.

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What are oxidising agents?

Oxidising agents are electron acceptors; they get reduced in redox reactions.

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What happens to the oxidation number of an element when it is reduced?

It goes down.

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What happens to the oxidation number of an element when it is oxidised?

It goes up.

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What does the term 'OILRIG' stand for in redox reactions?

Oxidation

Is

Loss (of electrons)

Reduction

I

Gain (of electrons)

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How can oxidation numbers be used in redox equations?

To determine which element has been oxidised and which has been reduced.

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