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Chemistry  /  Chem 1712  ·  Atom · ~20 seconds

Reaction Intermediates

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A reaction intermediate is produced in one mechanism step and fully consumed in a later step, never appearing in the overall equation.

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The lone oxygen atom produced in ozone decomposition's first step is entirely consumed in the second, absent from the net equation.

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An intermediate is a real, if short-lived, species — unlike a transition state, it can be detected between steps.