Chemistry: Chemical Reaction

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Chemistry 2A – Assignment Chemical Reactions What is a catalyst and how does it work? A catalyst is a substance that provides a reaction pathway with lower activation energy. Understanding catalysts and their nature requires understanding the “Collision Theory”. Through the use of Collision Theory we can understand what is happening at the particle level during chemical reactions. In this theory chemical reactions are described in terms of the collisions of individual particles. For a reaction to occur, the following conditions must be met: 1. The individual particles of the reacting substances must collide. 2. The collision energy must be equal to or exceeding the minimum amount required, known as the activation energy. 3. The reacting particles must collide with a suitable orientation. Therefore, through the application of this theory and the requirements for a reaction to take place we understand that catalysts cause a greater percentage of collisions to have collision energy equal to or greater than the activation energy. This results in a greater percentage of successful colli...

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