Chemistry / Chem 1627 · Atom · ~20 seconds
Catalysis Previewed as a Rate Factor
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A catalyst is a substance that increases a reaction's rate without itself being permanently consumed by the reaction.
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Dilute hydrogen peroxide decomposes slowly on a shelf but foams rapidly on an open wound, sped by substances the tissue provides.
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A catalyst can appear to be consumed mid-reaction, but a true catalyst always reappears unchanged once the reaction completes.