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Homogenous Catalysts

A homogenous catalyst has the same physical state as the reactants. The catalyst reacts with the reactants to form an intermediate. The intermediate then breaks down to give the product regenerating the catalyst.For example, ethanol and ethanoic acid react to form the ester ethyl ethanoate. Concentrated sulfuric acid acts as the catalyst.CH3COOH (l) + C2H5OH (l) ⇌ CH3COOC2H5(l) + H2O(l)

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Specification: OCR Chemistry A (H032), AS-level, 3.2.2 Reaction rates. Topic: Reaction Rates.

Key terms in this lesson

Acid
A proton donor; a substance that releases hydrogen ions when dissolved in water.
Catalyst
A substance that increases the rate of a chemical reaction without being used up, by providing an alternative reaction pathway with a lower activation energy.

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