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Oxidation refers to the loss of oxygen.
Reduction occurs when a substance receives oxygen.
In redox reactions, electron transfer can occur.
Hydrogen sulfide (H₂S) undergoes oxidation when it loses hydrogen.
Electrons are transferred from the oxidizing agent to the reducing agent.
CuO is the reducing agent in the reaction with hydrogen.
The oxidation number of oxygen in most compounds is -2.
Oxygen is an oxidizing agent in redox reactions.
Reduction involves the loss of oxygen from a substance.
Hydrogen gas is the oxidizing agent in the reaction with copper(II) oxide.
Na → Na⁺ + e⁻ is a half-equation for oxidation.
Cl₂ + 2e⁻ → 2Cl⁻ is a half-equation for oxidation.
Mg + O₂ → MgO is a redox reaction.
Reduction can be defined as the gain of electrons.
Cu²⁺ → Cu is an oxidation process.