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Catalysts are substances that speed up chemical reactions without being used up themselves. Understanding how catalysts work, their role in industrial processes, and their biological equivalents (enzymes) is an important part of the AQA GCSE Chemistry specification. This lesson covers the definition and properties of catalysts, how they affect activation energy, their industrial importance, and the distinction between catalysts and enzymes.
A catalyst is a substance that increases the rate of a chemical reaction without being chemically changed or used up at the end of the reaction.
Key properties of a catalyst:
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