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Questions and Answers
Apa yang memungkinkan katalis bekerja untuk reaksi tertentu?
Apa yang memungkinkan katalis bekerja untuk reaksi tertentu?
Apa yang terjadi pada molekul reaktan saat bereaksi dengan katalis>
Apa yang terjadi pada molekul reaktan saat bereaksi dengan katalis>
Bagaimana cara meningkatkan laju reaksi dengan menggunakan katalis?
Bagaimana cara meningkatkan laju reaksi dengan menggunakan katalis?
Apa yang membuat katalis biologis berbeda dari katalis lainnya?
Apa yang membuat katalis biologis berbeda dari katalis lainnya?
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Apa yang terjadi pada katalis saat reaksi selesai?
Apa yang terjadi pada katalis saat reaksi selesai?
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Apa yang digunakan dalam produksi asam sulfur?
Apa yang digunakan dalam produksi asam sulfur?
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Study Notes
Catalysts
Definition
- A catalyst is a substance that speeds up a chemical reaction without being consumed or altered in the process.
- Catalysts work by lowering the activation energy required for the reaction to occur.
Characteristics
- Catalysts are not reactants or products in the reaction.
- They can be reused multiple times without losing their effectiveness.
- Catalysts only work for specific reactions.
Types of Catalysts
- Homogeneous catalysts: Present in the same phase (solid, liquid, or gas) as the reactants.
- Heterogeneous catalysts: Present in a different phase than the reactants.
- Biological catalysts: Enzymes, which are proteins that speed up biochemical reactions.
How Catalysts Work
- Adsorption: The reactant molecules bind to the surface of the catalyst.
- Activation: The catalyst lowers the activation energy required for the reaction.
- Reaction: The reaction occurs on the surface of the catalyst.
- Desorption: The product molecules are released from the surface of the catalyst.
Factors Affecting Catalyst Activity
- Concentration: Increasing the concentration of the catalyst can increase the reaction rate.
- Surface area: Increasing the surface area of the catalyst can increase the reaction rate.
- Temperature: The optimal temperature for a catalyst can vary depending on the reaction.
Examples of Catalysts
- Vanadium(V) oxide (V2O5): Used in the production of sulfuric acid.
- Zeigler-Natta catalysts: Used in the production of polyethylene and polypropylene.
- Enzymes: Used in biological reactions, such as digestion and metabolism.
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Description
Learn about catalysts, their definition, characteristics, types, and how they work in chemical reactions. Understand the factors that affect their activity and see examples of catalysts in action.
