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Half equation
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A half-equation, also known as a half-reaction, represents either the oxidation or reduction portion of a redox reaction. It shows the change in the oxidation state of a specific species, including the transfer of electrons. For example, in the reaction of zinc with copper(II) ions, the half-equation for the oxidation of zinc is: Zn(s) → Zn²⁺(aq) + 2e⁻.
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