CHEM 1127Q Chapter Notes - Chapter 4: Oxidation State, Oxidizing Agent, Half-Reaction

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Oxidation - referring to oxidation-reduction (redox) reactions. Oxidation-reduction reaction - reactions where one or more element involved undergoes a change in oxidation number. Oxidation = loss of electrons = increase in oxidation number. Reduction = gain of electrons = decrease in oxidation number. Reducing agent = species that is oxidized. Oxidizing agent = species that is reduced. Half reaction - the process with regard to each individual reactant in a oxidation- reduction reaction. Oxidation-reduction reaction with ionic compounds - involves transfer of electrons. Oxidation-reduction reaction with covalent compounds - does not involve transfer of electrons. Oxidation number (oxidation state) - charge its atom would possess if the compound was ionic. * oxidation number is written with the sign followed by number. Combustion reactions - the reactant (fuel) and oxidant (often molecular oxygen) react vigorously and produce significant amounts of heat, and often light, in the form of a flame.

Related Questions

Oxidation-reduction reactions (often called "redox" for short) are reactions that involve the transfer of electrons from one species to another. Oxidation states, or oxidation numbers, allow chemists to keep track of these electron transfers. In general, one element will lose electrons (oxidation), with the result that it will increase in oxidation number, and another element will gain electrons (reduction), thereby decreasing in oxidation number.

An oxidizing agent is an element or compound in a redox reaction that oxidizes another species and itself gets reduced and is therefore the electron acceptor in the reaction.

A reducing agent is an element or compound in a redox reaction that reduces another species and itself gets oxidized and is therefore the electron donor in the reaction.

As a summary, keep in mind the following:

Match the word or term on the left with its definition on the right: Oxidation state Reducing agent Oxidation Redox reaction Reduction Oxidizing agent 1)a number that signifies the number of electrons that have been gained or lost by an atom of an element. 2)a reaction in which elements are oxidized and reduced, and electrons are transferred between substances. 3)the loss of electrons. 4)the gain of electrons. 5)the reactant in a redox reaction that accepts electrons, removing them from the reactant being oxidized. 6)the reactant in a redox reaction that provides electrons, giving them to the reactant being reduced.

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CHEM 1127Q Chapter Notes - Chapter 4: Oxidation State, Oxidizing Agent, Half-Reaction

CHEM 1127Q Full Course Notes

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