3.12: Know that a Catalyst is a Substance that Increases the Rate of a Reaction, but is Chemically Unchanged at the End of the Reaction

CATALYST: Substance that increases the rate of a reaction, whilst remaining chemically unchanged at the end of reaction

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• As catalyst will be chemically unchanged, mass of catalyst will stay the same

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ENERGY LEVEL DIAGRAM:

Diagram showing Effect of Catalyst on Rate of a Reaction