Reaction mechanism

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A step-by-step description of a chemical reaction. Each step is called an elementary step. Any molecular event that significantly alters a molecule’s energy or geometry or produces a new molecule. Reaction mechanism must be consistent with: Stoichiometry for the overall reaction. The experimentally determined rate law. It is only possible to show that a proposed mechanism is consistent with the observed rate law (i.e. it does not prove that the proposed mechanism is correct)