BRAINCAKEHomogenous Catalysts
Homogenous catalysts are in the same physical state as the reactants. During the course of the reaction an intermediate species is formed. The intermediate then reacts to form the final product.
An example is the catalysis of the oxidation of I- iodide ions by peroxodisulfate ions S2O82- by Fe2+ ions. The uncatalysed reaction is slow because both ions are negative and so repel each other giving a high activation energy.
Sign in free to see the rest of this lesson, the R.E.C.I.P.E. recall steps and the quiz
BrainCake is free. Make an account in seconds and pick up where this page stops.
Key terms in this lesson
- intermediate
- A species formed in one step of a reaction mechanism and used up in a later step, so it does not appear in the overall equation.
- activation energy
- The minimum energy required for a collision between particles to result in a reaction.
More in Transition Metals
- Tollens Reagent
- Redox Potential
- Redox Titrations
- Heterogenous Catalysts
- Autocatalysis
- Hydration of Metal Ions
- Reaction with Ammonia Solution
- Reaction with Sodium Hydroxide
All 21 lessons in Transition Metals · All OCR A-level Chemistry topics