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Chapter 20

Chapter 20: Oxidation Reduction Reactions

Oxidation-reduction reactions: reactions that involve the process of oxidation and reduction.
Oxidation: complete or partial loss of electrons or gain of oxygen.
Reduction: complete or partial gain of electrons or loss of oxygen.
Reducing agent: the substance that loses electrons.
Oxidizing agent: the substance that excepts electrons.
Oxidation number: a positive or negative number assigned to an atom to indicate its degree or oxidation or reduction.
Oxidation-number-change method: you balance a redox equation by comparing the increases and decreases in oxidation numbers.
Half-reaction: an equation showing just the oxidation or just the reaction that takes place.
Half-reaction method: you write and balance the oxidation and reduction half-reactions separately before combining them into a balanced redox equation.
Created by: jmhschemistry