3.2.2 0.0 / 5 ? ChemistryReaction RatesASOCR Created by: Lara_BryceCreated on: 30-05-18 20:33 How does increasing the concentration affect the rate of reaction? When the concentration of a reactant is increased, the rate of reaction increases, as there are more successful collisions. 1 of 6 What is a catalyst? A substance that changes the rate of a chemical reaction without being used up in the overall reaction. 2 of 6 How does a catalyst increase the rate of reaction? A catalyst provides an alternative reaction pathway with lower activation energy. 3 of 6 Why are catalysts important for sustainability? Catalysts increase the rate of reaction by lowering the activation energy, which reduces the temperature and energy needed for the reaction. 4 of 6 How does the Boltzmann distribution change with increased temperature? The curve shifts right, as more molecules have more energy and can overcome the activation energy of the reaction. 5 of 6 How does the Boltzmann distribution change with catalysts? The Botzmann distribution remains the same, but the Ea is reduced to Ec, so more molecules exceed the new lower activation energy. 6 of 6
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