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Oxidation and Reduction Reactions (Redox Reactions)
This is an introduction to oxidation-reduction reactions, also known as redox reactions. Learn what redox reactions are, get examples of oxidation-reduction reactions, and find out why redox reactions are important.
What Is an Oxidation-Reduction or Redox Reaction?
Any chemical reaction in which the oxidation numbers (oxidation states) of the atoms are changed is an oxidation-reduction reaction. Such reactions are also known as redox reactions, which is shorthand for reduction-oxidation reactions.
Oxidation and Reduction
Oxidation involves an increase in oxidation number, while reduction involves a decrease in oxidation number. Usually, the change in oxidation number is associated with a gain or loss of electrons, but there are some redox reactions (e.g., covalent bonding) that do not involve electron transfer. Depending on the chemical reaction, oxidation and reduction may involve any of the following for a given atom, ion, or molecule:
Oxidation involves the loss of electrons or hydrogen OR gain of oxygen OR increase in oxidation state.
Reduction involves the gain of electrons or hydrogen OR loss of oxygen OR decrease in oxidation state.
Example of an Oxidation-Reduction Reaction
The reaction between hydrogen and fluorine is an example of an oxidation-reduction reaction:
H2 + F2 → 2 HF
The overall reaction may be written as two half-reactions:
H2 → 2 H+ + 2 e− (the oxidation reaction)
F2 + 2 e− → 2 F− (the reduction reaction)
There is no net change in charge in a redox reaction so the excess electrons in the oxidation reaction must equal the number of electrons consumed by the reduction reaction. The ions combine to form hydrogen fluoride:
H2 + F2 → 2 H+ + 2 F− → 2 HF
Importance of Redox Reactions
The electron transfer system in cells and oxidation of glucose in the human body are examples of redox reactions. Oxidation-reduction reactions are vital for biochemical reactions and industrial processes as well. Redox reactions are used to reduce ores to obtain metals, to produce electrochemical cells, to convert ammonia into nitric acid for fertilizers, and to coat compact discs.
SOLVED:What is an oxidation-reduction reaction? G – Oxidation-reduction reactions are reactions in which electrons are transferred from one reactant to another and the oxidation states of certain atoms are changed.Oxidation Reduction Reactions—Redox Reactions. What Is an Oxidation-Reduction or Redox Reaction? The electron transfer system in cells and oxidation of glucose in the human body are examples of redox reactions.7.1 Predicting Whether A Reaction Will Occur 7.2 Reactions In Which A Solid Forms 7.3 Describing Reactions In Aqueous Solutions 7.4 Reactions That Form Water: Acids And Bases 7.5 Reactions Of Metals With Nonmetals (oxidation What is transferred during such a reaction? check_circle.
Oxidation and Reduction Reactions (Redox Reactions) – Oxidising and reducing agents. An oxidising agent is substance which oxidises something else. In the above example, the iron(III) oxide is the oxidising agent. Reducing agents remove oxygen from another substance. Oxidation and reduction in terms of hydrogen transfer. These are old definitions…As such, electron-transfer reactions are also called oxidation-reduction reactionsA chemical reaction in which electrons are transferred from one Also called a redox reaction., or simply redox reactions. The atom that loses electrons is oxidized, and the atom that gains electrons is reduced.For the oxidation- reduction reaction equation given here, 2Na+S -> Na2S indicate how many electrons are transferred in the formation of one formula unit of produce.
What is an oxidation—reduction reaction? What is transferred… – Reduction-oxidation reactions are chemical reactions involving a change in oxidation state in an educt and a product through the transfer of one or more electrons from an electron donor (the reducing agent) to an electron acceptor (the oxidizing agent).Redox reactions — reactions in which there's a simultaneous transfer of electrons from one chemical species to another — are really composed of two different reactions: oxidation (a loss of electrons) and reduction (a gain of electrons). The electrons that are lost in the oxidation reaction are the…An oxidation-reduction (redox) reaction is a type of chemical reaction that involves a transfer of electrons between two species. An oxidation-reduction reaction is any chemical reaction in which the oxidation number of a molecule, atom, or ion changes by gaining or losing an electron.