How to write half equations for redox reactions

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Chemistry Stack Exchange is a question and answer site for scientists, academics, teachers, and students in the field of chemistry. It only takes a minute to sign up. Connect and share knowledge within a single location that is structured and easy to search. In most videos, people use oxidation numbers to find the oxidizing agent and the reducing agent, It's a great way to use, but our teacher never used it before he would give us a reaction and ask us directly to write the half reactions and what are the oxidizing and reducing agent on each.
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How to Combine Chemical Equations

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How to Balance Net Ionic Equations

Redox oxidation-reduction reactions include all chemical reactions in which atoms have their oxidation states changed. Oxidation is the loss of electrons—or the increase in oxidation state—by a molecule, atom, or ion. Reduction is the gain of electrons—or the decrease in oxidation state—by a molecule, atom, or ion. Describing the overall electrochemical reaction for a redox process requires balancing the component half-reactions for oxidation and reduction.
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How to Balance Net Ionic Equations

This page explains how to work out electron-half-reactions for oxidation and reduction processes, and then how to combine them to give the overall ionic equation for a redox reaction. This is an important skill in inorganic chemistry. The ionic equation for the magnesium-aided reduction of hot copper II oxide to elemental copper is given below :.
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Overview: This section reviews reduction-oxidation redox reactions, a common type of chemical reaction. Skills: Determining oxidation states Balancing redox reaction equations New terms: Reduction Oxidation Half-reaction Oxidation State Oxidation Number Redox reactions are reactions in which one species is reduced and another is oxidized. Therefore the oxidation state of the species involved must change. These reactions are important for a number of applications, including energy storage devices batteries , photographic processing, and energy production and utilization in living systems including humans. Reduction: A process in which an atom gains an electron and therefore decreases or reduces its oxidation number.
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