on . Posted in Chemical Engineering

Oxidation is a chemical process that involves the loss of electrons by an atom, molecule, or ion.  It is a types of chemical reactions and plays a significant role in many natural and industrial processes.  Oxidation is a crucial concept in chemistry and has many practical applications.  It is involved in the corrosion of metals, the generation of energy in batteries, the production of chemicals in various industries, and biological processes within living organisms, among others.  Understanding oxidation and its counterpart, reduction, is fundamental to comprehending the behavior of matter in chemical reactions.

Oxidation reactions are characterized by

  • Loss of Electrons  -  In an oxidation reaction, one or more atoms or molecules lose electrons.  This loss of electrons results in an increase in the oxidation state (or oxidation number) of the species undergoing oxidation.  Oxidation is often referred to as the process of "gaining oxygen" or "losing hydrogen," although it's important to note that not all oxidation reactions involve oxygen.
  • Oxidizing Agent  -  The substance that causes another substance to undergo oxidation is called the oxidizing agent.  The oxidizing agent itself gets reduced (gains electrons) during the reaction because it accepts the electrons that are being lost by the substance being oxidized.
  • Redox Reactions  -  Many chemical reactions involve both oxidation and reduction processes.  These reactions are called redox (short for reduction-oxidation) reactions. In a redox reaction, one substance is oxidized (loses electrons), and another substance is simultaneously reduced (gains electrons).  The transfer of electrons between the two substances drives the reaction.
  • Examples of Oxidation  -  Some common examples of oxidation reactions include the rusting of iron (iron reacts with oxygen to form iron oxide), combustion reactions (burning of fuels like gasoline or wood), and the oxidation of glucose during cellular respiration in living organisms.
  • Oxidation States  -  Oxidation states are assigned to atoms in a compound to keep track of the electron flow during chemical reactions.  In simple terms, the oxidation state indicates the "charge" an atom would have if electrons were fully transferred in a bond.  For example, in H2O (water), oxygen has an oxidation state of -2, while hydrogen has an oxidation state of +1.

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Tags: Cathodic Protection Corrosion