Oxidation

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Oxidation is the loss of [[Electron|electrons]] from an [[Atom|atom]] or [[Ions|ion]]. It can also be defined as an increase in the oxidation state of an [[Element|element]]. Oxidation cannot occur without the opposite process, reduction, taking place at the same time. If electrons are lost from one species they must be gained by another. [[Copper|Copper]] looses 2 [[Electron|electrons]] to form copper 2+ ions, here the copper has been oxidised, as it has lost [[Electron|electrons]]&nbsp;<ref>Salters Advanced Chemistry Chemical Ideas, Chris Otter et al., 3rd Edition, Heinemann, 2008</ref>.<br>  
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Oxidation is the loss of [[Electron|electrons]] from an [[Atom|atom]] or [[Ions|ion]]. It can also be defined as an increase in the oxidation state of an [[Element|element]]. Oxidation cannot occur without the opposite process, reduction, taking place at the same time. If electrons are lost from one species they must be gained by another. [[Copper|Copper]] looses 2 [[Electron|electrons]] to form copper 2+ ions, here the copper has been oxidised, as it has lost [[Electron|electrons]]&nbsp;<ref>Salters Advanced Chemistry Chemical Ideas, Chris Otter et al., 3rd Edition, Heinemann, 2008</ref>.<br>
  
An oxidising agent is a species that can bring about the oxidation of a substance. It does this by accepting the electrons lost. This results in the oxidising agent itself being reduced in the process.
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An oxidising agent is a species that can bring about the oxidation of a substance. It does this by accepting the electrons lost. This results in the oxidising agent itself being reduced in the process. An example of this is the activated carrier molecule called NADH,&nbsp;this molecule carries high energy electrons and hydrogen atoms and it becomes reduced in the process of food molcule oxidation from NAD<sup>+<ref name="oxidation">Alberts, Johnson, Lewis, Raff, Roberts, Walter, (2008), Molecular biology of the cell, 5th edition, New York, Garland science.</ref></sup>.  
  
All oxidation reactions also involve reduction and so the overall processes are referred to asa redox reactions.<br>  
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All oxidation reactions also involve reduction and so the overall processes are referred to asa redox reactions.<br>
  
 
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Revision as of 07:07, 10 January 2011

Oxidation is the loss of electrons from an atom or ion. It can also be defined as an increase in the oxidation state of an element. Oxidation cannot occur without the opposite process, reduction, taking place at the same time. If electrons are lost from one species they must be gained by another. Copper looses 2 electrons to form copper 2+ ions, here the copper has been oxidised, as it has lost electrons [1].

An oxidising agent is a species that can bring about the oxidation of a substance. It does this by accepting the electrons lost. This results in the oxidising agent itself being reduced in the process. An example of this is the activated carrier molecule called NADH, this molecule carries high energy electrons and hydrogen atoms and it becomes reduced in the process of food molcule oxidation from NAD+[2].

All oxidation reactions also involve reduction and so the overall processes are referred to asa redox reactions.

References

  1. Salters Advanced Chemistry Chemical Ideas, Chris Otter et al., 3rd Edition, Heinemann, 2008
  2. Alberts, Johnson, Lewis, Raff, Roberts, Walter, (2008), Molecular biology of the cell, 5th edition, New York, Garland science.


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